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Began documenting JBIG2 functionality

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John Whitington 2024-01-27 16:20:47 +00:00
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cpdfmanual.pdf
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cpdfmanual.tex
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@ -3625,7 +3625,11 @@ The \texttt{-dump-attachments} operation, when given a PDF file and a directory
\section{Extracting images} \section{Extracting images}
Cpdf can extract the raster images to a given location. JPEG and JPEG2000 images are extracted directly. Other images are written as PNGs, processed with either ImageMagick's ``magick'' command, or NetPBM's ``pnmtopng'' program, whichever is installed. JBIG2 image extraction is not yet supported. Cpdf can extract the raster images to a given location. JPEG and JPEG2000 and lossless JBIG2 images are extracted directly.
Lossy JBIG2 images are extracted likewise, but an extra \texttt{\_\_<n>} is added, giving the number of the JBIG2Global stream for this image, which is extracted as \texttt{<n>.jbig2global}. You may reconstruct the individual images with, for example, \texttt{jbig2dec}.
Other images are written as PNGs, processed with either ImageMagick's ``magick'' command, or NetPBM's ``pnmtopng'' program, whichever is installed.
\begin{framed} \begin{framed}
\noindent\small\verb@cpdf -extract-images in.pdf [<range>] [-im <path>] [-p2p <path]@ \noindent\small\verb@cpdf -extract-images in.pdf [<range>] [-im <path>] [-p2p <path]@