Casio V-N500 Series User Manual page 227

User documentation:
install.doc How to confi gure and install the IJG software.
usage.doc Usage instructions for cjpeg, djpeg, jpegtran, rdjpgcom, and wrjpgcom.
*.1 Unix-style man pages for programs (same info as usage.doc).
wizard.doc Advanced usage instructions for JPEG wizards only.
change.log Version-to-version change highlights.
Programmer and internal documentation:
libjpeg.doc How to use the JPEG library in your own programs.
example.c Sample code for calling the JPEG library.
structure.doc Overview of the JPEG library's internal structure.
fi lelist.doc Road map of IJG fi les.
coderules.doc Coding style rules --- please read if you contribute code.
Please read at least the files install.doc and usage.doc. Useful information can also
be found in the JPEG FAQ (Frequently Asked Questions) article. See ARCHIVE
LOCATIONS below to fi nd out where to obtain the FAQ article.
If you want to understand how the JPEG code works, we suggest reading one or more of
the REFERENCES, then looking at the documentation fi les (in roughly the order listed)
before diving into the code.
OVERVIEW
==========
This package contains C software to implement JPEG image compression and
decompression. JPEG (pronounced "jay-peg") is a standardized compression method for
full-color and gray-scale images. JPEG is intended for compressing "real-world" scenes;
line drawings, cartoons and other non-realistic images are not its strong suit. JPEG is lossy,
meaning that the output image is not exactly identical to the input image. Hence you must
not use JPEG if you have to have identical output bits. However, on typical photographic
images, very good compression levels can be obtained with no visible change, and
remarkably high compression levels are possible if you can tolerate a low-quality image.
For more details, see the references, or just experiment with various compression settings.
This software implements JPEG baseline, extended-sequential, and progressive
compression processes. Provision is made for supporting all variants of these processes,
although some uncommon parameter settings aren't implemented yet. For legal reasons,
we are not distributing code for the arithmetic-coding variants of JPEG; see LEGAL
ISSUES. We have made no provision for supporting the hierarchical or lossless processes
defi ned in the standard.
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