Vector Error Filters
The format for the filter coefficients is [F(0,1)|F(1,1)|F(1,0)|F(1,-1)] where F(0,0) is the center pixel.
For an RGB image each filter co-efficient is a 3 x 3 matrix.
Error Filter -- HVS model based on the Linearized CIELab Flohr et. al.[1993]
Fflohr =
[ 0.5269 -0.0000 0.0700 -0.0000
-0.0000 0.0068 0.0000 0.0668 0.0000 0.2814
0.0000 0.0481;
0.0000 0.4577 -0.0000 -0.0000 -0.0000 -0.0000
0.0930 0.2328 0.0000 -0.0000 0.1938 0.0228;
-0.0000 -0.0000 0.0000 -0.0000 -0.0000 0.0000
0.0330 -0.0000 0.9670 -0.0000 -0.0000 -0.0000];
Error Filter -- HVS model based on Opponent Color Space Wandell and Zhang [1997]
Fopp =
[0.5580 0.0000 0.0520
-0.0000 -0.0000 -0.0000 0.0000 -0.0000 -0.0000
0.3436 -0.0000 0.0464;
-0.0000 0.4799 -0.0000 -0.0000 -0.0000 0.0000
0.0486 0.2477 0.0000 -0.0000 0.2238 0.0000;
0.0000 -0.0000 0.2756 -0.0000 0.0000 0.0000
0.0653 -0.0000 0.6591 0.0000 -0.0000 0.0000];
Error Filter -- HVS model based on YUV color Space
FYUV =
[0.5657 0.0000 0.0000
0.0000 -0.0000 0.0009 0.0307 -0.0000 0.0000 0.3873
0.0154 0.0000;
-0.0000 0.4818 0.0000 0.0008 0.0000 -0.0000
0.0012 0.2769 0.0000 -0.0000 0.2394 -0.0000;
-0.0000 -0.0000 0.4956 0.0014 -0.0000 0.0000
-0.0000 0.0043 0.2592 0.0000 0.0000 0.2395];
Error Filter -- HVS model based on YIQ color Space
FYIQ =
[ 0.6005 0.0000 0.0000 0.0000
0.0000 -0.0000 0.0000 -0.0000 0.0000 0.3995
-0.0000 -0.0000;
-0.0000 0.4659 0.0212 -0.0000 0.0000 0.0000
0.0297 0.2542 0.0000 -0.0000 0.2039 0.0251;
0.0000 -0.0000 0.5424 0.0000 -0.0000 -0.0000
-0.0000 0.0203 0.1278 -0.0000 0.0000 0.3095];