t Copyright (c) 2001-2003 Leon Bottou, Yann Le Cun, Patrick Haffner, Copyright (c) 2001 AT&T Corp., and Lizardtech, Inc. This is free documentation; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU General Public License's references to "object code" and "executables" are to be interpreted as the output of any document forma...
NAMEdjvumake - Assemble DjVu image files.
SYNOPSISdjvumake djvufile [chkid=argument]...
DESCRIPTIONProgram djvumake assembles a single-page DjVu file djvufile by copying or creating chunks according to the provided arguments. Supported arguments are as follows:
- Create the initial information chunk. Arguments w, h, and dpi describe the width, height and resolution of the image. All arguments may be omitted. The default resolution is 300 dpi. The default width and height will be retrieved from the first mask chunk specified in the command line options.
JB2foreground mask chunk. File jb2file may contain raw JB2 data, or be a DjVu file containing JB2 data such as those produced by program cjb2.
MMR/G4foreground mask chunk. File mmrfile may contain raw MMR data or be a DjVu file containing MMR data.
Create one or more
IW44background chunks. File iw44file must containIW44data. Such files can be obtained by compressing the background image with program c44 and extracting the rawIW44data using program djvuextract. The optional argument n indicates the number of chunks to copy from the IW44 file. Omitting the number of chunks copies all available chunks.
JPEGencoded background chunk. File jpegfile must containJPEGencoded data.
JPEG-2000background chunk. File jpegfile must containJPEG-2000encoded data. The DjVu decoder does not yet display files containing JPEG-2000 data.
Create a foreground color chunk describing one solid
color for each
JB2encoded mark. The argument can be the name filename of a file containing the raw data. Such files are best created using program djvuextract(1). Alternatively the argument could describe a sequence of color zones. Each color zone specifies a color name color, and optionally the coordinates x,y,w,h of a rectangle. Each mark receives the color of the last color zone whose rectangle intersects the bounding box of the mark. The mark is painted black if its bounding box does not intersect one of the zones. The rectangle coordinates are expressed in pixels with the origin at the bottom left corner of the page. The full page is assumed when no rectangle coordinates are specified. Color names can be specified with exactly six hexadecimal digits, e.g. FGbz=#FF8080, or by one of the following sixteen HTML color names defined by the W3C, e.g. FGbz=#red.
aqua black blue fuchsia gray green lime maroon navy olive purple red silver teal white yellow
IW44foreground color chunk. File iw44file must containIW44data. Such files can be obtained by compressing the background image with command c44 and extracting the rawIW44data using program djvuextract. Only the first chunk is copied.
JPEGforeground color chunk.
JPEG-2000foreground color chunk. The DjVu decoder does not yet display files containing JPEG-2000 data.
- Create a DjVu3 include chunk pointing to the component file named fileid. The resulting file should then be included into a multipage document using command djvm.
JB2shape dictionary. File jb2file must contain raw JB2 data describing a JB2 dictionary.
IW44background chunk and aIW44foreground color chunk by masking and subsampling thePPMfile ppmfile.
Assume, for instance, that we have aPPMimage myimage.ppm and an identically sizedPBMbitonal image mymask.pbm whose black pixels indicate which pixels belong to the foreground. Such a bitonal file might have been obtained by thresholding or color-keying thePPMimage. We can then produce a DjVuDocument image using the following two commands:
cjb2 mymask.pbm mymask.djvu
djvumake my.djvu Sjbz=mymask.djvu PPM=myimage.ppm
The DjVu specification documents in the directory
of the DjVuLibre distribution provide the
authoritative information about the composition
of a legal DjVu image file.