Identify pixel positions in a Bayer array
[rx, ry ,bx ,by, g1x, g1y, g2x, g2y] = bayerIndices(bPattern,sz,[clip])
This routine is called by AdaptiveLaplacian and other demosaicking
routines. The locations of the various pixel types are returned in the
parameters. An array of all the r pixels in a mosaic can be calculated
as bayerData(ry,rx)
bPattern is a string (e.g., 'rggb')
sz: the array size (e.g., 128). It can be specified as a single
number or as a 2-vector (row,col)
clip:
In some cases, we only want the locations of the pixels in a certain
region of sensor, say in from the edge. For example in
AdaptiveLaplacian, we want indices that start at 3,4 and end at
Hex-2,Vex-2. So, we allow a special parameter, clip, that lets the
measurements start a 1+clip and end at Hex/Vex - clip.
Example:
[rx, ry ,bx ,by, g1x, g1y, g2x, g2y] = bayerIndices('grbg',[16,16]);
[rx, ry ,bx ,by, g1x, g1y, g2x, g2y] = bayerIndices('gbrg',16);
[rx, ry ,bx ,by, g1x, g1y, g2x, g2y] = bayerIndices('rggb',16,2);
[rx, ry ,bx ,by, g1x, g1y, g2x, g2y] = bayerIndices('gbrg',16);
Copyright ImagEval Consultants, LLC, 2005.