Revision: | 1.1 |
Committed: | Sat Feb 22 02:07:21 2003 UTC (21 years, 1 month ago) by greg |
Branch: | MAIN |
CVS Tags: | rad3R7P2, rad3R7P1, rad4R1, rad4R0, rad3R5, rad3R6, rad3R6P1, rad3R8, rad3R9 |
Log Message: | Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release |
# | Content |
---|---|
1 | { |
2 | Compute difference between luminance of two images. |
3 | Display towards red where first image is brighter, |
4 | and towards blue where second image is brighter. |
5 | |
6 | 29 August 1991 |
7 | } |
8 | l1=li(1); l2=li(2); |
9 | avg=(l1+l2)/2; |
10 | dif=(l1-l2)/2; |
11 | ro=avg+dif; |
12 | go=avg-dif*dif/2; |
13 | bo=avg-dif; |