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1992-04-07
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WinJPEG v.0.90 (preliminary version)
by Norman and Ken Yee
Introduction
------------
WinJPEG 1.00 is an image viewer for Microsoft Windows. It will display
JPEG, TARGA, GIF, PCX, and BMP images, and it will export an image to
JPEG or GIF format. Once an image is loaded, you will be able to modify the
amount of red, green, and blue in the image, and you will be able to magnify/
reduce portions of the image.
This preliminary version of WinJPEG has very limited functionality. It
allows you to view JPEG images of any size in 256-color mode only. Also, it
monopolizes the CPU as it decompresses a JPEG image, unlike the full version.
This was released because a lot of people have expressed an interest in
having a Windows JPEG viewer and even this limited functionality will
be useful; please destroy this preliminary version when the full version
is released.
The full version doesn't have these limitations. It can display images
in 32,768-color mode for those of you who have a video card with the Sierra
HiColor DAC. In addition, it will allow other programs to be preemptively
multitasked under Windows. The reminder for registering WinJPEG is removed
from this version too.
Speed of JPEG
-------------
The JPEG decompression algorithm is computationally intensive so it will
take some time to decompress the image. Here is a table of the times (in
minutes) for displaying various JPEG files on different machines:
--------------------------------------------------------------------
| File | Spatial Resolution | Time to Display |
| | | 386-40 MHz 386SX-16MHz |
--------------------------------------------------------------------
| trecall0 | 439 x 541 | 0:35 | 2:13 |
| fenn-00 | 547 x 528 | 0:40 | 2:32 |
| ksc | 635 x 733 | 1:04 | 4:02 |
| falcon | 1011 x 735 | 1:45 | 6:30 |
--------------------------------------------------------------------
Registration
------------
The full version of WinJPEG will be available at the end of May. It may
be purchased by completing the order form and mailing the form and $15 to:
Norman Yee
58 Chandler St.
Boston, MA 02116
When you register, you will receive WinJPEG v.1.00, a user manual, and a
collection of JPEG images(I will put as many as I can fit on 2 720k 3 1/2"
floppies or on 4 360k 5 1/4" floppies). Once you are registered, you will
receive upgrades of WinJPEG for free except for a small charge for the disk
and shipping. If you have a Internet account or a Compuserve account, you
will be e-mailed upgrades for no charge.
If you have any questions, comments, suggestions, or bug reports, please
feel free to send me e-mail to my Internet account: nyee@osiris.ee.tufts.edu
Disclaimer
----------
The authors of this program accept no responsibility for damages that
are caused by this program and make NO WARRANTY or representation, either
express or implied, with respect to this software. This software is provided
"AS IS", and you, its user, assume the entire risk when you use it.
WinJPEG is copyright (C) 1992, Norman and Ken Yee. All rights reserved.
Acknowledgements
----------------
This software is based in part on the work of the Independent JPEG Group.
The Graphics Interchange Format(c) is the Copyright property of CompuServe
Incorporated. GIF(sm) is a Service Mark property of CompuServe Incorporated.