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    1. Windows
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  2. Linux
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  3. Mac OSX

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Customizing K2PDFOPT:
    1. K2pdfopt GUIs
    2. Disabling the Windows GUI
    3. The interactive menu
    4. List of command-line options
    5. Using a shortcut
  (now with video!)
  6. Using the K2PDFOPT environment variable
  7. Using the command line

Adjusting the output:
    1. Screen Size
    2. Increasing the magnification
    3. Landscape mode
    4. Output File Size
    5. Setting Margins
    6. Color Output
    7. Uneven Line Breaks/ Excess Margins

Processing Options:
    1. Showing Markings
    2. OCR
    3. Native PDF
  (now with video!)
    4. Auto-Straightening
    5. Ignoring Borders/ Headers/Footers
    6. Detecting Columns
    7. Column Order
    8. Right-to-Left Page Scanning
    9. Using Ghostscript
 
  LIST OF K2PDFOPT COMMAND-LINE OPTIONS
NOTE: A couple command-line options changed from v1.50 to v1.51. See the k2pdfopt version history (under v1.51) for full details.

This is the entire list of k2pdfopt command-line options that come directly from the "usage" output of k2pdfopt. You can get this list by typing ? at the interactive menu or with the command-line option -?.

To see how to use these options with k2pdfopt, see the "Customizing K2pdfopt" menu at the left, e.g. using a shortcut or using an environment variable. Many of these options have equivalents in the interactive menu.

k2pdfopt v2.21 (w/MuPDF,DjVuLibre,OCR) (c) 2014, GPLv3, http://willus.com
    Compiled Jul 25 2014 with Gnu C (Mingw64) v4.8.3 for Win64 on x64.

usage:  k2pdfopt [opts] <input pdf/djvu | folder>

(Or just drag a PDF or DJVU (.djvu) file to this icon.)

Attempts to optimize PDF (or DJVU) files (especially two-column ones) for
display on the Kindle (or other mobile readers/smartphones) by looking for
rectangular regions in the file and re-paginating them without margins and
excess white space.  Works on any PDF or DJVU (.djvu) file, but assumes it
has a mostly-white background.  Native PDF files (not scanned) work best.

If given a folder, k2pdfopt first looks for bitmaps in the folder and if
any are found, converts those bitmaps to a PDF as if they were pages of a
PDF file.  If there are no bitmaps in the folder and if PDF files are in
the folder, then each PDF file will be converted in sequence.

Output files are always .pdf and have _k2opt added to the source name by
default (see -o option to specify alternate output name.)

K2PDFOPT environment variable
-----------------------------
You can supply command-line options via the environment variable K2PDFOPT,
for example,

     set K2PDFOPT=-ui- -x -j 0 -m 0.25

Command line options from the command line take precedence over the ones in
the environment variable K2PDFOPT.

Command Line Options
--------------------
-?[-]             Show [don't show] usage only (no file processing).
                  Combine with -ui- to get something you can redirect
                  to a file.
-a[-]             Turn on [off] text coloring (use of ANSI color codes) on
                  the screen output.  Default is on.
-as[-] [<maxdeg>] Attempt to automatically straighten tilted source pages.
                  Will rotate up to +/-<maxdegrees> degrees if a value is
                  specified, otherwise defaults to 4 degrees max.  Use -1 to
                  turn off. Default is off (-as -1 or -as-).
-bmp[-] <pageno>  Generate [do not generate] a bitmap rendering of converted
                  page number <pageno> and write it to file k2pdfopt_out.png.
                  If this option is used, no other files are written, i.e. the
                  complete conversion is NOT done--ONLY the bitmap file is
                  written.  If -sm is also specified, then the bitmap is of
                  marked source page <pageno>.  If -bmp-, then <pageno> is not
                  necessary.  Default is -bmp-.
-bp[+|-|--] [m|<inches>] Break [do not break] output pages at end of each input
                  page.  Default is -bp-.  If a numeric value is put after -bp,
                  then rather than breaking the output page at the end of each
                  input page, a gap is inserted of that many inches, e.g.
                  -bp 1 will insert a 1-inch gap between contents of each
                  input page.  Special option -bp+ will break the pages at
                  the green boundaries between region as marked by the -sm
                  option (see -sm).  If bookmark information is available
                  and -toc is specified (on by default) page breaks will be
                  inserted in the converted file at each bookmark unless -bp--
                  is specified.  If "-bp m" is specified, then a page break
                  is inserted after each major (red-box) section.  This can
                  help prevent text selection overlap problems in native output
                  mode.  See also -toc, -bpl.
-bpc <nn>         Set the bits per color plane on the output device to <nn>.
                  The value of <nn> can be 1, 2, 4, or 8.  The default is 4
                  to match the kindle's display capability.
-bpl <srcpagelist>   Insert page break in destination file before each source
                  file page listed in <srcpagelist>.  This has the same format
                  as the -p option.  See also -p, -bp, -toc, -toclist.  Default
                  is no page list.  Example:  -bpl 10,25,50,70,93,117,143.
                  This automatically sets -bp to it's default value (-bp-).
-c[-]             Output in color [grayscale].  Default is grayscale.
-cbox[<pagelist>|-] <cropbox>   Similar to the -grid option, but allows you to
                  specify exact crop boxes from the source page which will
                  then be processed as major (red-box) regions.  These regions
                  can then become individual output pages or can be processed
                  further (searched for columns, re-flowed, etc.) depending on
                  what other options are selected.  By default, they are
                  processed further, like every other major region.
                  You may specify the -cbox option multiple times to crop out
                  different parts of each source page, each crop being treated
                  as a major region.  See the -mode command.  To have each
                  crop box become a new page in the output file, for example,
                  use -mode crop, e.g.
                      k2pdfopt myfile.pdf -mode crop -cbox 2in,3in
                  <cropbox> has the format <left>,<top>,<width>,<height>
                  where all values are specified from the upper-left corner of
                  the source page, with units, like the -w and -h options,
                  except that the default units for -cbox are inches.  If only
                  <left> and <top> are specified, then <width> and <height>
                  extend to the edge of the page.
                  Example: -cbox 1in,1in,6in,9in (same as -cbox 1,1,6,9).
                      This specifies a crop box that is 6 x 9 inches and which
                      has an upper left corner which is 1 inch from the left
                      and top of the source page.
                  use -cbox- to clear all cropboxes.
                  You can use a page list, <pagelist>, to specify on which
                  pages to apply the cropboxes.
                  Examples:
                      -cbox5-51o ... applies the cropbox on pages 5,7,9,...,51.
                                     ('o' = odd.  Use 'e' for even.)
                      -cbox1,2-5,13,15  ... applies the cropbox on pages 1,2,3,
                                            4,5,13, and 15.
                  Be sure not to put a space between -cbox and the page list.
                  The default is no crop boxes (-cbox-).
-col <maxcol>     Set max number of columns.  <maxcol> can be 1, 2, or 4.
                  Default is -col 2.  -col 1 disables column searching.
-cg <inches>      Minimum column gap width in inches for detecting multiple
                  columns.  Default = 0.1 inches.  Setting this too large
                  will give very poor results for multicolumn files.  See also
                  -cgmax.
-cgmax <inches>   Max allowed gap between columns in inches.  If the gap
                  between two regions exceeds this value, they will not be
                  considered as separate columns.  Default = 1.5.  Use -1 for
                  no limit (disable).  See also -cg.
-cgr <range>      Set column-gap range, 0 - 1.  This is the horizontal range
                  over which k2pdfopt will search for a column gap, as a
                  fraction of the page width.  E.g. -cgr 0.5 will search
                  from 0.25 to 0.75 of the page width for a column gap.
                  Set this to a small value, e.g. 0.05, to only search for
                  column breaks in the middle of the page.  Default = 0.33.
-ch <inches>      Minimum column height in inches for detecting multiple
                  columns.  Default = 1.5 inches.
-cmax <max>       Set max contrast increase on source pages.  1.0 keeps
                  contrast from being adjusted.  Use a negative value to
                  specify a fixed contrast adjustment.  Def = 2.0.
-comax <range>    Stands for Column Offset Maximum.  The <range> given is as a
                  fraction of the total horizontal 2-column span, as with -cgr,
                  and it specifies how much the column divider can move around
                  and still have the columns considered contiguous.  Set to -1
                  to revert back to how columns were treated in k2pdfopt v1.34
                  and before.  Default = 0.2.
-crgh <inches>    Set the min height of the blank area that separates regions
                  with different numbers of columns.  Default = 1/72 inch.
-d[-]             Turn on [off] dithering for bpc values < 8.  See -bpc.
                  Default is on.
-de <size>        Defect size in points.  For scanned documents, marks
                  or defects smaller than this size are ignored when bounding
                  rectangular regions.  The period at the end of a sentence is
                  typically over 1 point in size.  The default is 1.0.
-dev <name>       Select device profile (sets width, height, dpi, and corner
                  marking for selected devices).  Currently the selection is
                  limited.  <name> just has to have enough characters to
                  uniquely pick the device.  Use -dev ? to list the devices.
                  Default is -dev kindle2.
-dpi <dpival>     Same as -odpi.
-dr <value>       Display resolution multiplier.  Default = 1.0.  Using a
                  value greater than 1 should improve the resolution of the
                  output file (but will make it larger in size).  E.g. -dr 2
                  will double the output DPI, the device width (in pixels),
                  and the device height (in pixels).
-ds <factor>      Override the document size with a scale factor.  E.g. if
                  your PDF reader says the PDF file is 17 x 22 inches and
                  it should actually be 8.5 x 11 inches, use -ds 0.5.  Default
                  is 1.0.
-evl <n>          Detects and erases vertical lines in the source document
                  which may be keeping k2pdfopt from correctly separating
                  columns or wrapping text, e.g. column dividers.  If <n> is
                  zero, this is turned off (the default).  If <n> is 1, only
                  free-standing vertical lines are removed.  If <n> is 2,
                  vertical lines are erased even if they are the sides of
                  an enclosed rectangle or figure, for example.
-f2p <val>        Fit-to-page option.  The quantity <val> controls fitting
                  tall or small contiguous objects (like figures or
                  photographs) to the device screen.  Normally these are fit
                  to the width of the device, but if they are too small or
                  too tall, then if <val>=10, for example, they are allowed
                  to be 10%% wider (if too small) or narrower (if too tall)
                  than the screen in order to fit better.  Use -1 to fit the
                  object no matter what.  Use -2 as a special case--all
                  "red-boxed" regions (see -sm option) are placed one per
                  page.  Default is -f2p 0.  See also -jf.
                  Note:  -f2p -2 will automatically also set -vb -2 to
                  exactly preserve the spacing in the red-boxed region.  If
                  you want to compress the vertical spacing in the red-boxed
                  region, use -f2p -2 -vb -1.
-fc[-]            For multiple column documents, fit [don't fit] columns to
                  the width of the reader screen regardless of -odpi.
                  Default is to fit the columns to the reader.
-g <gamma>        Set gamma value of output bitmaps. A value less than 1.0
                  makes the page darker and may make the font more readable.
                  Default is 0.5.
-grid <C>x<R>[x<O>][+]  Grid the source page into <C> columns by <R> rows with
                  with <O> percent overlap.  No regard will be made for trying
                  to break the page between columns or rows of text.  If a +
                  is specified, the destination page order will go across and
                  then down, otherwise it will go down and then across.  To
                  turn off gridding, specify a zero value for the columns or
                  for the rows.  Default is no gridding.  The default overlap
                  is 2%%.  Example:  -grid 2x2x5.  By default, gridding also
                  sets the following options, which can be overridden by
                  following the grid option with other command options:
                  -n -wrap- -f2p -2 -vb -2 -col 1.  For example, if you want
                  a column search done on each grid piece, you can put this:
                  -grid 2x2 -col 2.  See also -cbox.
-gtc <inches>     Threshold value for detecting column gaps (expert mode).
                  Sets how many of the pixels in the column shaft can be
                  non-white (total height of a line crossing the shaft in
                  inches).  See also -gtr.  Default = .005.
-gtr <inches>     Threshold for detecting gaps between rows (expert mode).
                  This sets the maximum total black pixels, in inches, on
                  average, that can be in each row of pixels before the gap is
                  no longer considered a gap.  A higher value makes it easier
                  to detect gaps between rows of text.  Too high of a value
                  may inadvertently split figures and other graphics.
                  Default = 0.006.  See also -rsf.
-gtw <inches>     Threshold for detecting word gaps (expert mode).
                  See -gtr.  Default = .0015.
-gui[-]           Use [don't use] graphical user interface (MS Windows only).
                  If k2pdfopt is started from a console (command-line), the
                  default is not to launch the gui unless there are no command-
                  line options given.  If k2pdfopt is launched via its icon,
                  then the default is to launch the GUI.
-guimin[-]        Start the k2pdfopt GUI minimized.  Def = not minimized.
-h <height>[in|cm|s|t|p|x] Set height of output device in pixels, inches, cm,
                  source page size (s), trimmed source region size (t),
                  pixels (p), or relative to the OCR text layer (x).
                  The default units are pixels (p), and the default value
                  is 735 (the height of the Kindle 2 screen in pixels).
                  Examples:
                      -h 6.5in   Sets the device height to 6.5 in
                                 (using the output dpi to convert to
                                  pixels--see -dpi).
                      -h 1.5s    Sets the device height to 1.5 times the
                                 source page height (same as -h -1.5).
                      -h 1t      Sets the device height to whatever the
                                 trimmed page height is (you can follow
                                 -mode copy with -h 1t to make the output
                                 page height equal to the crop box height.
                      -h 0.5x    Sets the device height to half of the
                                 height of the box exactly surrounding
                                 the OCR text layer on the source page.
                  See also -w, -dpi, -dr.
-hy[-]            Turn on [off] hyphen detection/elimination when wrapping
                  text.  Default is on.
-gs[-][-]         Force use of Ghostscript instead of MuPDF to read PDFs.
                  K2pdfopt has built-in PDF translation (via the MuPDF
                  library) but will try to use Ghostscript if Ghostscript
                  is available and the internal (MuPDF) translation fails
                  (virtually never happens).  You can force Ghostscript to
                  be used with this -gs option.  Use -gs- to use Ghostscript
                  only if MuPDF fails.  Use -gs-- to never use Ghostscript.
                  Download ghostscript at http://www.ghostscript.com.
-idpi <dpi>       Set pixels per inch for input file.  Use a negative value
                  as a multiplier on the output dpi (e.g. -2 will set the
                  input file dpi to twice the output file dpi (see -odpi).
                  Default is -2.0.
-j -1|0|1|2[+/-]  Set output text justification.  0 = left, 1 = center,
                  2 = right.  Add a + to attempt full justification or a -
                  to explicitly turn it off.  The default is -1, which tells
                  k2pdfopt to try and maintain the justification of the
                  document as it is.  See also -wrap.
-jf 0|1|2 [<inches>]  Set figure (tall region) justification.  If a figure
                  has left or right margins available, this option allows
                  you to set the justification differently than the text.
                  E.g. you can center figures with -jf 1.  If you want to
                  specify a minimum height for figures (e.g. minimum region
                  height where this justification applies), you can tack it
                  on at the end, e.g. -jf 1 1.5 to center any region taller
                  than 1.5 inches.  Default is 0.75 inches for the minimum
                  height and to use the same justification on figures as
                  the rest of the document (-jf -1).  See also -f2p to fit
                  small or tall figures to the page.
-jpg [<quality>]  Use JPEG compression in PDF file with quality level
                  <quality> (def=90).  A lower quality value will make your
                  file smaller.  See also -png.
-l <lang>         See -ocrlang.
-lang <lang>      See -ocrlang.
-ls[-]            Set output to be in landscape [portrait] mode.  The
                  default is portrait.
-m[b|l|r|t] <val>[<units>][,<val>[units][,...]]  Set global crop margins for
                  every page.  You can also use the more powerful -cbox option
                  to do this same thing.  The default units are inches.
                  For available units and their descriptions, see -h.
                  If more than one value is given (comma-delimited with no
                  spaces in between), the order is left, top, right, bottom.
                  Examples:
                      -m 0.5cm
                         Sets all margins to 0.5 cm.
                      -m 0.5cm,1.0cm
                         Sets the left margin to 0.5 cm and all the other
                         margins to 1.0 cm.
                      -m 0.2in,0.5in,0.2in,0.5in
                         Sets the left and right crop margins to
                         0.2 inches and the top and bottom to 0.5 inches.
                      -mt 1cm
                         Sets the top margin to 0.5 cm.
                      -m -0.1x,-0.1x,1.1x,1.1x
                         With the 'x' unit, the behavior is a little
                         different.  Rather than specifying the widths
                         of each margin, you specify the position of
                         the crop box relative to the OCR text layer
                         in the source file, where 0x,0x,1x,1x would
                         exactly bound the OCR text layer.
                  The default crop margins are 0 inches.
                  [NOTE: The default was 0.25 inches for all margins before
                         v1.65.]
-mc[-]            Mark [don't mark] corners of the output bitmaps with a
                  small dot to prevent the reading device from re-scaling.
                  Default = mark.
-mode <mode>      Shortcut for setting multiple options at once which
                  determine the basic way in which k2pdfopt will behave.
                  Available modes are:
                      copy   Same as -n- -wrap- -col 1 -vb -2 -w 1s -h 1s
                             -dpi 150 -rt 0 -c -t- -f2p -2 -m 0 -om 0 -pl 0
                             -pr 0 -pt 0 -pb 0 -mc-.  Makes k2pdfopt
                             behave exactly like my pdfr program--source
                             pages are simply copied to the output file, but
                             rendered as bitmaps.  No trimming or re-sizing
                             is done.  Can also use -mode pdfr.
                      fp     Also can use fitpage.  Same as -n -wrap- -col 1
                             -vb -2 -f2p -2 -t.
                      fw     Same as -n -wrap- -col 1 -vb -2 -t -ls.  Makes
                             k2pdfopt behave like sopdf's "fit width"
                             option.  Can also use -mode sopdf.
                      2col   Same as -n -wrap- -col 2 -vb -2 -t.
                             Optimizes for a 2-column scientific article with
                             native PDF output.
                      tm     Trim margins--same as -mode copy, but sets the
                             output to be trimmed to the margins and the width
                             and height of the output to match the trimmed
                             source pages.  Also uses native mode.  Equivalent
                             to -n -wrap- -col 1 -vb -2 -f2p -2 -t -w 1t -h 1t
                             -rt 0 -c -m 0 -om 0 -pl 0 -pr 0 -pt 0 -pb 0 -mc-.
                             Can also use -mode trim.
                      crop   Used with -cbox option, puts each cropped area
                             on a separate page, untrimmed, and sizes the
                             page to the cropped region.  Same as -wrap-
                             -col 1 -vb -2 -w 1t -h 1t -t- -rt 0 -c -f2p -2
                             -m 0 -om 0 -pad 0 -mc- -n
                      def    Default k2pdfopt mode: -wrap -n- -col 2 -vb 1.75
                             -dev k2 -rt auto -c- -t -f2p 0 -m 0 -om 0.02
                             -ls-.
                  You can modify modes by overriding their options after
                  specifying the mode, e.g. -mode fw -vb -1.
-n[-]             Use "native" PDF output format.  NOTE: if you want native
                  PDF output, it's probably best to use a -mode option like
                  -mode fitwidth or -mode 2col, both of which automatically
                  turn on native PDF output and optimize other settings for it.
                  Native PDF output preserves the native source PDF contents,
                  i.e. the output PDF file is not rendered as a sequence of
                  bitmapped pages like in the default k2pdfopt output mode.
                  Instead, the source PDF's native content is used along with
                  additional PDF instructions to translate, scale, and crop
                  the source content.  With native PDF output, if the source
                  file has selectable text, the text remains selectable in
                  the output file.  The output file can also be zoomed
                  without loss of fidelity.  This may also result in a
                  smaller output file (but not always).  By default, native
                  PDF output format is turned off.  See also -mode.
                  NOTES:
                  1. Native PDF output cannot be used with text wrapping
                     on (see -wrap option).  Turning it on will disable
                     text wrapping.
                  2. Native PDF output is not recommended for source
                     files which are scanned (there is no benefit unless
                     the scanned document includes a layer of OCR text).
                  3. Native PDF output is incompatible with OCR (see -ocr),
                     though OCR is typically not necessary if the native PDF
                     contents are kept.  Turning on native PDF output will
                     disable OCR.
                  4. Native PDF output can only be used with PDF source
                     files (it does not work with DJVU source files).
                  5. Contrast adjust, gamma correction, and sharpening
                     are disabled with native PDF output.
                  6. It is recommended that you use -vb -2 with native PDF
                     output, particularly if you are having difficulty
                     selecting/searching text in the output PDF file.
                  7. This option works well with -mode fw, -mode 2col, or
                     with the -grid option.  It is used by default in those
                     cases.
-neg[-]           Inverse [don't inverse] the output images (white letters
                  on black background, or "night mode").
-ng <gap>         Set gap between notes and main text in the output document.
                  The <gap> defaults to inches but can have other units (see
                  -h, for example).  See -nl and -nr for how to turn on notes
                  processing.  Default is -ng 0.2.
-nl[<pages>] [<leftbound>,<rightbound>]
-nr[<pages>] [<leftbound>,<rightbound>]
                  The source document has notes in the left (-nl) or right
                  (-nr) margins.  Specific pages can be specified for the
                  notes using <pages> (same format as -cbox or -p).  If
                  <leftbound>,<rightbound> are specified, they specify the
                  fraction of the page width where to look for the break
                  between the notes and the main page.  E.g.
                  -nl 0.15,0.25 will look for the boundary between the notes
                  and the text between 15%% and 25%% of the way across the
                  source page.  Use -nl- to turn off all processing of notes
                  in the margins (default).  Default values for <leftbound>
                  and <rightbound> are 0.05 to 0.35 for -nl and 0.65 to 0.95
                  for -nr.
                  Notes in the margins are treated differently than other
                  "columns" of text.   They will be interspersed with the
                  text in the adjacent column of main text.
                  Note that -nr... or -nl... will also set -cg to 0.05.
-o <namefmt>      Set the output file name using <namefmt>.  %s will be
                  replaced with the base name of the source file, and %d
                  will be replaced with the source file count (starting
                  with 1).  The .pdf extension will be appended you don't
                  specify it.  E.g. -o out%04d.pdf will result in output
                  files out0001.pdf, out0002.pdf, ... for the converted
                  files.  Def = %s_k2opt
-ow[-] [<mb>]     Set the minimum file size (in MB) where overwriting the
                  file will not be done without prompting.  Set to -1 (or
                  just -ow with no value) to overwrite all files with no
                  prompting.  Set to 0 (or just -ow-) to prompt for any
                  overwritten file.  Def = -ow 10 (any existing file
                  over 10 MB will not be overwritten without prompting).
-om[b|l|r|t] <val>[<units>][,<val>[units][,...]]  Set the blank area margins
                  on the output device.  Works very much like the -m option.
                  See -m for more about the syntax.  Default = 0.02 inches.
                  Note that the 's', 't', and 'x' units for -om all behave
                  the same and scale to the device size.  E.g. -om 0.1s will
                  make the device screen margins 0.1 times the device width
                  (for the left and right margins) or height (for the top and
                  bottom margins) of the output device screen.
-ocr[-] [g|t|m]   Attempt [don't attempt] to use optical character
                  recognition (OCR) in order to embed searchable text into
                  the output PDF document.  If followed by t or g, specifies
                  the ocr engine to use (tesseract or gocr).  If followed by
                  m, and if the PDF document has text in it, then the MuPDF
                  engine is used to extract the text (sort of a virtual OCR).
                  If -ocr is specified with no argument, tesseract is used.
                  If tesseract fails (e.g. no language files found), GOCR
                  is used.  The overall default operation of k2pdfopt is
                  -ocr m.  See also -ocrvis and -ocrhmax.
                  NOTE:  Turning on OCR will disable native PDF output.
                  DISCLAIMER:  The main intent of OCR isn't to improve the
                      visual quality of the text at all--at least not the way
                      k2pdfopt does it.  OCR is most useful on scanned PDFs
                      that don't have selectable text to begin with, but using
                      OCR with k2pdfopt on such documents doesn't change the
                      look of the output PDF file at all.  The OCR text is
                      simply placed invisibly over the scanned text so that
                      you appear to be able to select the scanned text (when,
                      in fact, you are selecting the invisibly placed OCR
                      text).  So the only time you will even notice the OCR
                      errors is if you try to search for a word and can't find
                      that word because the OCR of that word is incorrect, or
                      if you copy a selection of the OCR text and paste it
                      into something else so that you can actually see it.
-ocrcol <n>       If you are simply processing a PDF to OCR it (e.g. if you
                  are using the -mode copy option) and the source document has
                  multiple columns of text, set this value to the number of
                  columns to process (up to 4).
                  [NOTE:  As of v2.20, this option is no longer necessary
                   and is ignored.]
-ocrhmax <in>     Set max height for an OCR'd word in inches.  Any graphic
                  exceeding this height will not be processed with the OCR
                  engine.  Default = 1.5.  See -ocr.
-ocrlang <lang>   Select the Tesseract OCR Engine language.  This is the
                  root name of the training data, e.g. -lang eng for English,
                  -ocrlang fra for French, -ocrlang chi_sim for simplified
                  Chinese.  You can also use -l.  The default language is
                  whatever is in your Tesseract trained data folder.  If you
                  have more than one .traineddata file in that folder, the
                  one with the most recent time stamp is used.
                  NOTE: Using the -ocrvis t option will not show the OCR text
                  correctly for any character above unicode value 255 since
                  k2pdfopt does not use any embedded fonts, but the text
                  will convert to the correct Unicode values when copy /
                  pasted.
                  NOTE 2: Tesseract allows the specification of multiple
                  language training files, e.g. -ocrlang eng+fra would
                  specify English as the primary and French as the secondary
                  OCR language.  In practice I have not found this to work
                  very well.  Try multiple languages in different orders.
-ocrout[-] <namefmt>  Write [don't write] UTF-8 OCR text output to file
                  <namefmt>.  See the -o option for more about how
                  <namefmt> works.  Default extension is .txt.  Default is
                  no output.
-ocrsort[-]       When a PDF document has its own OCR/Text layer, this option
                  orders the OCR text layer by its position on the page.  This
                  should not be necessary unless the OCR layer was very poorly
                  generated.  Default is -ocrsort- (off).
-ocrsp[+|-]       When generating the OCR layer, do an entire row of text at
                  once, with spaces between each words.  By default (-ocrsp-),
                  each word is placed separately in the PDF document's OCR
                  layer.  This causes problems with text selection in some
                  readers (for example, individual words cannot be selected).
                  Using -ocrsp- may fix behavior like this, but will result in
                  less accurate word placement since k2pdfopt does not try to
                  exactly match the font used by the document.  Use -ocrsp+
                  to allow more than one space between each word in the row
                  of text in order to optimize the selection position.
-ocrvis <s|t|b>   Set OCR visibility flags.  Put 's' to show the source doc,
                  't' to show the OCR text, and/or 'b' to put a box around
                  each word.  Default is -ocrvis s.  To show both the source
                  document and the OCR text overlayed on top:  -ocrvis st.
                  See also -ocr.  See also -ocrlang (the note about -ocrvis t).
-odpi <dpi>       Set pixels per inch of output screen (def=167). See also
                  -dr, -w, -h, -fc.  You can also use -dpi for this.
-p <pagelist>     Specify pages to convert.  <pagelist> must not have any
                  spaces.  E.g. -p 1-3,5,9,10- would do pages 1 through 3,
                  page 5, page 9, and pages 10 through the end.  The letters
                  'e' and 'o' can be used to denote even and odd pages, e.g.
                      -p o,e        Process all odd pages, then all even ones.
                      -p 2-52e,3-33o    Process 2,4,6,...,52,3,5,7,...,33.
-pad <padlist>    A shortcut for -pl, -pt, -pr, -pb.  E.g. -pad 15,10,13,20
                  is the same as -pl 15 -pt 10 -pr 13 -pb 20.  Also, using
                  -pad 15 will set all pads to 15, for example.
-p[b|l|r|t] <nn>  Pad [bottom|left|right|top] side of destination bitmap with
                  <nn> rows.  Defaults = 4 (bottom), 0 (left), 3 (right), and
                  0 (top).  Example:  -pb 10.  This is typically only used on
                  certain devices to get the page to come out just right.  For
                  setting margins on the output device, use -om. See also -pad.
-png              (Default) Use PNG compression in PDF file.  See also -jpeg.
-r[-]             Right-to-left [left-to-right] page scans.  Default is
                  left to right.
-rls[+|-]         Restore [+] or don't restore [-] the last command-line
                  settings from the environment variable K2PDFOPT_CUSTOM0.
                  The default (-rls) is to restore the settings if there are no
                  other command-line options specified when running (from.
                  either the command line or the K2PDFOPT env var.), unless
                  those options are "-gui" or specify a file name.
-rsf <val>        Row Split Figure of merit (expert mode).  After k2pdfopt has
                  looked for gaps between rows of text, it will check to see
                  if there appear to be missed gaps (e.g. if one row is twice
                  the height of all the others).  Increasing this value makes
                  it harder for k2pdfopt to split a row.  Lowering it makes it
                  easier.  Default value = 20.
-rt <deg>|auto[+]|aep  Rotate source page counterclockwise by <deg> degrees.
                  Can be 90, 180, 270.  Or use "-rt auto" to examine up to
                  10 pages of each file to determine the orientation used
                  on the entire file (this is the default).  Or use "-rt aep"
                  to auto-detect the rotation of every page.  If you have
                  different pages that are rotated differently from each other
                  within one file, you can use this option to try to auto-
                  rotate each source page.  Use -rt auto+ to turn on auto-
                  detect even in preview mode (otherwise it is off).
-s[-]             Sharpen [don't sharpen] images.  Default is to sharpen.
-sm[-]            Show [don't show] marked source.  This is a debugging tool
                  where k2pdfopt will mark the source file with the regions it
                  finds on them and the order in which it processes them and
                  save it as <srcfile>_marked.pdf.  Default is not to show
                  marked source.  Red regions are found on the first pass
                  (use -f2p -2 to put each red region on a separate page).
                  Green lines mark vertical regions affected by -vb and -vs.
                  Gray lines mark individual rows of text (top, bottom, and
                  baseline).  Blue boxes show individual words (passed to OCR
                  if -ocr is specified).
-sp[-]            For each file on the command-line, just echo the number
                  of pages--don't process.  Default = off (-sp-).
-t[-]             Trim [don't trim] the white space from around the edges of
                  any output region.  Default is to trim.  Using -t- is not
                  recommended unless you want to exactly duplicate the source
                  document.
-to[-]            Text only output.  Remove figures from output.  Figures are
                  determined empirically as any contiguous region taller than
                  0.75 inches (or you can specify this using the -jf option).
                  Use -to- to turn off (default).
-toc[-]           Include [don't include] table of contents / outline /
                  bookmark information in the PDF output if it is available
                  in the source file (works only for PDF source files and
                  only if MuPDF is compiled in).  By default, a new destination
                  page is started at each bookmark location.  Do disable this,
                  see the -bp option.  If -toc- is specified, bookmark
                  information from the source file is ignored.  See also
                  -toclist.  Default is -toc.
-toclist <pagelist>|<file>  Override the PDF source file's outline information
                  (bookmarks / table of contents) with either a list of source
                  pages or a file describing the table of contents. If you
                  specify a list of pages, e.g. -toclist 5,10,20,40,100
                  then those pages are marked as Chapter 1, 2, etc.,
                  respectively.  If you specify a file name, the file should be
                  a text file formatted like this example:
                      1 Introduction
                      10 Chapter 1
                      +10 Chapter 1, Part A
                      +25 Chapter 1, Part B
                      ++25 Chapter 1, Part B, Subsection 1
                      ++27 Chapter 1, Part B, Subsection 2
                      +30 Chapter 1, Part C
                      50 Chapter 2
                      70 Chapter 3
                  The '+' indicates a sub-level heading (multiple +'s for
                  multiple sub-levels).  The first number on the line is the
                  source page reference number.  The rest of the text on the
                  line is the name of the chapter / subheading.
                  Note:  This option overrides -toc.  To get a template from
                  an existing PDF file, see the -tocsave option.
-tocsave <file>   If an outline exists in the PDF file (and -toc is specified)
                  write that outline to text file <file> in the format required
                  by -toclist.  See -toc, -toclist.
-ui[-]            User input query turned on [off].  Default = on for linux or
                  if not run from command line in Windows.
-v                Verbose output.
-vb <thresh>      Set gap-size vertical-break threshold between regions that
                  cause them to be treated as separate regions.  E.g. -vb 2
                  will break the document into separate regions anywhere
                  there is a vertical gap that exceeds 2 times the median
                  gap between lines of text.  These separate regions may
                  then be scaled and aligned independently.
                  Special values:  Use -vb -1 to preserve all horizontal
                  alignment and scaling across entire regions (vertical
                  spacing may still be adjusted).  Use -vb -2 to exactly
                  preserve each region (both horizontal alignment and
                  vertical spacing--this is the value used by -mode fw, for
                  example).  The default is -vb 1.75.
-vls <spacing>    Set vertical line spacing as a fraction of the text size.
                  This can be used to override the line spacing in a document.
                  If 1, then single spacing is used.  2 = double spacing.
                  If negative, then the absolute value acts as the limiting
                  case.  E.g., if you set -vls -1.5, then any the line
                  spacing of the original document is preserved unless it
                  exceeds 1.5 (times single spacing).  Default = -1.2.
                  See also -vs.
-vs <maxgap>      Preserve up to <maxgap> inches of vertical spacing between
                  regions in the document (marked in green when using -sm
                  option).  This value has no effect if you use a negative
                  value for -vb.  The default value is 0.25.
                  See also -vls, -vb.
-w <width>[in|cm|s|t|p] Set width of output device.  Default is 560.  See -h.
-wrap[-|+]        Enable [disable] text wrapping.  Default = enabled.  If
                  -wrap+, regions of text with lines shorter than the mobile
                  device screen are re-flowed to fit the screen width.  If
                  you use -wrap+, you may want to also specify -fc- so that
                  narrow columns of text are not magnified to fit your device.
                  Text wrapping disables native PDF output (see -n option).
                  See also -ws, -j, -fc, -n.
-ws <spacing>     Set minimum word spacing for line breaking as a fraction of
                  the height of a lowercase 'o'.  Use a larger value to make it
                  harder to break lines.  If negative, automatic word spacing
                  is turned on.  The automatic spacing leans toward breaking
                  long words between letters to be sure to fit text to the
                  device display.  Def = -0.20.  The absolute value of the
                  setting, if negative, is used as a minimum allowed value.
                  If you want k2pdfopt to aggressively break lines (e.g. break
                  apart long words if they don't fit on a line), use a smaller
                  absolute value, e.g. -ws -0.01.  A positive value works as
                  it did in v2.18 and before.  The default value was changed
                  from 0.375 in v2.18 to -0.20 in v2.20.  See also -wrap.
-wt[+] <thresh>   Any pixels whiter than <thresh> (0-255) are treated as
                  "white".  Setting this lower can help k2pdfopt better process
                  some poorly-quality scanned pages or pages with watermarks.
                  Note that the pixels which are above this threshold value and
                  therefore are treated as white are not actually changed to
                  pure white (255) unless the '+' is also included.  Otherwise,
                  this only sets a threshold.
                  The default value is -1, which tells k2pdfopt to pick the
                  optimum value.  See also -cmax.
-x[-]             Exit [don't exit--wait for <Enter>] after completion.


 

This page last modified
Saturday, 30-Nov-2013 12:58:25 MST