Remosaic of RGB image array

Converts a MxNx3 color image array into a 2Mx2N intensity mosaic.

Description

Interleaves the color pages of an MxNx3 color image array into presumably what was the original, 2Mx2N, intensity output of a Bayer image sensor. Useful for capturing a monochromatic image (like actively illuminated IR) with a color sensor (like a cheap color webcam). It does not compensate for effects due to demosaic or any image processing done between the image sensor array and this function.

• MATLAB release: MATLAB 7.3 (R2006b)

[Oliver Woodford]

This function neither inverts the demosaicing process (which doesn't halve the image size), nor generates an intensity image (each pixel is the intensity of one of the R, G, or B channels).