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Notes for Microsoft
Windows
The information in this appendix provides troubleshooting notes for installing and
running Prolifics on Microsoft Windows.
DLLs for JPEG Decoding
WECJLIB.DLL is a dynamic link library which performs JPEG decoding. There are
two versions of the DLL. The version that comes with Prolifics can be freely
distributed. An enhanced version, which has added functionality, can be ordered
from Express Compression Labs (ECL).
In the version of the DLL provided with Prolifics, images are rendered using
ordered dithering. The enhanced version of the DLL supports Hi-Color and
Tru-Color display hardware. With such hardware, dithering is not necessary and
the best possible picture quality can be achieved. Two-pass color quantization and
improved dithering are also supported in the enhanced version, which results in
better picture quality on 256-color display devices.
To order single- and multiple-user licenses for the enhanced version of the DLL,
email: ecl@netcom.com, or write:
Dr. Y. Shan
P.O. Box 367
Caulfield East VIC 3145, Australia
AA