Here is the preliminary documentation for the JPEG viewfinder program.

FILES IN THIS DIRECTORY:

vfjstdin.c              original variant of vf.c
vfj_working.c           original one with working ftp support added
vfjbetter.c             with better ftp scripts and system calls
vfjinteractive.c        with mouse (trackball) adj. brightness and whitebalance
                        (each of the above is a superset of the previous one)

writejpeg.c             subroutine called by the above

sendPics                shell script to implement wearable wireless webcam
ftpcommands             shell script called by sendPics


you should make directories called "sent" and "sending" in which scripts
will write local copies of the images.

USEAGE: ./vf [startframenumber]

vf is a simple SVGAlib implementation of the viewfinder program , with 
two added bonus features: When you click the left mouse button, it drops a jpeg
picture on your hard drive (called eXXXX, where XXXX is the arguement
startframenumber, or 0 if none was provided), and when you click the right
button, it executes an arbitrary script (sendPics)(I have it sending stuff via
ftp, but you can do what you like).

With the wearcomp6 units used in class, there's a square button that latches
first mouse button (for rapid fire mode to take pictures as fast as possible).
The green light on means you're in rapidfire mode (press the square button
again to get out of this mode).

The other bonus is that the brightness and whitebalance are adjusted with the
trackball. Vertical controls the bright, and horizontal controls the whitebal.

The program is simple; you should be able to get it. Read the source, make sure
you have SVGAlib and libjpeg installed, and have fun!

There's a script to make the program, called makeit. This will make an
executable called `vf'. It will also take care of linking. We don't like
`make', it's overkill (too obfuscatory for very simple programs like this;))

CONTRIBUTORS:

Steve Mann (original wearable wireless webcam; overall direction of project)
Robert Erlich (erlichr@eyetap.org) vga hacking (svgalib, etc.)
Stephen Ross (sross@eyetap.org) who wrote the jpeg stuff and the ftp stuff.
James Fung (fungja@eyetap.org) who did a bunch of neat stuff.
(ECE1766 class of 1998)
Eric Moncrieff (eric@eyetap.org) who added the dynamic image control and 
               starting frame (command line arg to select first frame).
Will Waits (ww@eyetap.org) who added lockfiles
(ECE1766 class of 1999)

WEB SITES:
http://wearcam.org/ece1766.htm
http://engwear.org

DISCLAIMER: This program is in the EXTREME ALPHA STAGE of development.
In other words, it works for us but it may not work for you.