File: LabLuvTest.m

package info (click to toggle)
psychtoolbox-3 3.0.18.12.dfsg1-1.1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 83,576 kB
  • sloc: ansic: 173,181; cpp: 20,885; objc: 5,148; sh: 2,752; python: 1,366; php: 384; makefile: 193; java: 113
file content (25 lines) | stat: -rw-r--r-- 522 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
% LabLuvTest
% 
% Test routines that convert to CIELAB and CIELUV.
%
% 7/11/03  dhb  Added comments, change name.

% Set some XYZ values
XYZ = [100 100 100 ; 100 75 125]';
XYZ = [XYZ , XYZ/10000000];

% Set a white point
white = [200 200 200]';

% Convert to Luv
Luv = XYZToLuv(XYZ,white);
XYZ1 = LuvToXYZ(Luv,white);

% Convert to Lab
Lab = XYZToLab(XYZ,white);
XYZ2 = LabToXYZ(Lab,white);

% Check that inversion is correct
% up to roundoff error
fix( (XYZ-XYZ1)/1e-12 )
fix( (XYZ-XYZ2)/1e-12 )