djvumake (1) - Linux Manuals
djvumake: Assemble DjVu image files.
NAME
djvumake - Assemble DjVu image files.
SYNOPSIS
djvumake djvufile [chkid=argument]...DESCRIPTION
Program djvumake assembles a single-page DjVu file djvufile by copying or creating chunks according to the provided arguments. Supported arguments are as follows:- INFO=w,h,dpi
- 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.
- Sjbz=jb2file
- Create a JB2 foreground mask chunk. File jb2file may contain raw JB2 data, or be a DjVu file containing JB2 data such as those produced by program cjb2.
- Smmr=mmrfile
- Create a MMR/G4 foreground mask chunk. File mmrfile may contain raw MMR data or be a DjVu file containing MMR data.
- BG44=iw44file[:n]
- Create one or more IW44 background chunks. File iw44file must contain IW44 data. Such files can be obtained by compressing the background image with program c44 and extracting the raw IW44 data 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.
- BGjp=jpegfile
- Create a JPEG encoded background chunk. File jpegfile must contain JPEG encoded data.
- BG2k=jpegfile
- Create a JPEG-2000 background chunk. File jpegfile must contain JPEG-2000 encoded data. The DjVu decoder does not yet display files containing JPEG-2000 data.
- FGbz=(filename|{#color[:x,y,w,h]})
-
Create a foreground color chunk describing one solid
color for each
JB2
encoded 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 - FG44=iw44file
- Create a IW44 foreground color chunk. File iw44file must contain IW44 data. Such files can be obtained by compressing the background image with command c44 and extracting the raw IW44 data using program djvuextract. Only the first chunk is copied.
- FGjp=jpegfile
- Create a JPEG foreground color chunk.
- FG2k=jpegfile
- Create a JPEG-2000 foreground color chunk. The DjVu decoder does not yet display files containing JPEG-2000 data.
- INCL=fileid
- 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.
- Djbz=jb2file
- Create a JB2 shape dictionary. File jb2file must contain raw JB2 data describing a JB2 dictionary.
- PPM=ppmfile
-
Create a
IW44
background chunk and a
IW44
foreground color chunk
by masking and subsampling the
PPM
file
ppmfile.
Assume, for instance, that we have a PPM image myimage.ppm and an identically sized PBM bitonal 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 the PPM image. 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 doc of the DjVuLibre distribution provide the authoritative information about the composition of a legal DjVu image file.