jpeg????.zip - Convert JPEG files to/from BMP,PPM,PGM,TGA
Tom Lane
I have uploaded to Simtel.Net:
ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/jpegsr6b.zip 762613 bytes
ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/jpeg6b.zip 196506 bytes
ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/jpeg6b32.zip 203317 bytes
jpegsr6b.zip Source code for JPEG compression/decompression
jpeg6b.zip Convert JPEG files to/from BMP,PPM,PGM,TGA
jpeg6b32.zip Faster version of jpeg6b for 386 or better
These files are source code and DOS executables for release 6b of the
Independent JPEG Group's free JPEG image compression code. The IJG code
includes a reusable JPEG compression/decompression library, plus sample
applications "cjpeg" and "djpeg", which perform conversion between JPEG
JFIF format and image files in PPM/PGM (PBMPLUS), BMP, and Targa formats.
A third application "jpegtran" provides lossless transcoding between
different JPEG formats. Two small applications "wrjpgcom" and "rdjpgcom"
insert and extract textual comments in JFIF files.
The primary user-visible improvement in this new release is that the
"jpegtran" sample program is now able to perform lossless rotation and
flipping of JPEG images. Although there are some restrictions on the
dimensions of images that can be transformed cleanly, this facility may
be of considerable use to digital camera users.
To avoid the Unisys LZW patent, djpeg's GIF output capability has been
changed to produce "uncompressed GIFs", and cjpeg's GIF input capability
has been removed altogether. We're not happy about it either, but there
seems to be no good alternative if the code is to be freely distributed.
Jpeg6b is a "vanilla" version for any DOS machine. Jpeg6b32 is a faster
32-bit version; it will run only on 386 or better CPUs with at least 1Mb
extended or expanded memory. C source code is provided in Jpegsr6b.
Special requirements: None.
Changes: Additional features.
jpegsr6b.zip, jpeg6b.zip and jpeg6b32.zip have replaced jpegsr6a.zip,
jpeg6a.zip and jpeg6a32.zip.
Freeware. Uploaded by the author.
Tom Lane, Independent JPEG Group
jpeg...@uunet.uu.net
t...@sss.pgh.pa.us