[Jocr-devels] recognizing 7 segment numbers

[Carl K. <ca...@pe...>]

I have a webcam pointed at a digital volt meeter - it saves a jpg every minute. 
  I want to graph the numbers over time (time stamp of the file) - here is a sample:

http://dev.personnelware.com/carl/temp/Jul23/a/motion/01-20080723093400-snapshot.jpg

I am guessing this is outside what gocr is meant for, but figured I would ask, 
and ask for suggestions too.

one thought is I can probably check for which segments are on, and then it is a 
simple lookup: assign segments to bits, 0 is the 6 outer segments on, so 
something like 1111110 = 0x7e = 126.  1 is just the 2 on the right: 0110 0000 - 
0x60 = 96.

126, 0
96, 1
...
127, 8

The tricky part is identifying where the segments are.  for the most part 
everything is stationary, but as I re-configure my tests I move the cam/meeter 
around, so each run will have the segments in different parts of the image. 
If gocr could somehow help with this, yay.

Carl K