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- Independent JPEG Group's free JPEG software
- -------------------------------------------
-
- This package contains C software to implement JPEG image compression and
- decompression. JPEG is a standardized compression method for full-color
- and gray-scale images. JPEG is intended for "real-world" scenes; cartoons
- and other non-realistic images are not its strong suit. JPEG is lossy,
- meaning that the output image is not identical to the input image.
- The user can trade off output image quality against compressed file size by
- adjusting a compression parameter.
-
- The distributed programs provide conversion between JPEG "JFIF" format and
- image files in PBMPLUS PPM/PGM, Utah RLE, Truevision Targa, and GIF file
- formats. The core compression and decompression modules can easily be
- reused in other programs, such as image viewers. The package is highly
- portable C code; we have tested it on many machines ranging from PCs to Crays.
-
- We are releasing this software for both noncommercial and commercial use.
- Companies are welcome to use it as the basis for JPEG-related products.
- We do not ask a royalty, although we do ask for an acknowledgement in
- product literature (see the README file in the distribution for details).
- We hope to make this software industrial-quality --- although, as with
- anything that's free, we offer no warranty and accept no liability.
-
- For more information, contact jpeg-info@uunet.uu.net.
-
-
- Contents of this directory
- --------------------------
-
- jpegsrc.vN.tar.Z contains source code, documentation, and test files for
- release N.
-
- wallace.ps.Z is a PostScript file of Greg Wallace's introductory article
- about JPEG. This is an update of the article that appeared in the April
- 1991 Communications of the ACM.
-
- jpeg.documents tells where to obtain the JPEG standard and documents
- about JPEG-related file formats.
-
- jfif.ps.Z is a PostScript file of the JFIF (JPEG File Interchange Format)
- format specification.
-
- jfif.txt.Z is a plain text transcription of the JFIF specification; it's
- missing a figure, so use the PostScript version if you can.
-
- pm.errata is the errata list for the first printing of the textbook
- "JPEG Still Image Data Compression Standard" by Pennebaker and Mitchell.
-