Revision: | 1.2 |
Committed: | Wed Nov 30 21:26:39 2011 UTC (12 years, 5 months ago) by greg |
Branch: | MAIN |
CVS Tags: | rad5R4, rad5R2, rad4R2P2, rad5R0, rad5R1, rad4R2, rad4R2P1, rad5R3, HEAD |
Changes since 1.1: | +3 -1 lines |
Log Message: | Added check for negative green channel |
# | User | Rev | Content |
---|---|---|---|
1 | greg | 1.2 | { RCSid $Id$ } |
2 | greg | 1.1 | { |
3 | Compute difference between luminance of two images. | ||
4 | Display towards red where first image is brighter, | ||
5 | and towards blue where second image is brighter. | ||
6 | |||
7 | 29 August 1991 | ||
8 | } | ||
9 | l1=li(1); l2=li(2); | ||
10 | greg | 1.2 | pos(x):if(x,x,0); |
11 | greg | 1.1 | avg=(l1+l2)/2; |
12 | dif=(l1-l2)/2; | ||
13 | ro=avg+dif; | ||
14 | greg | 1.2 | go=pos(avg-dif*dif/2); |
15 | greg | 1.1 | bo=avg-dif; |