This menu allows to set the the color of the start row and start column used in the debayering algorithm.
Setting this option causes the debayering algorithm to interpret the top left pixel as blue and the next pixel as green.
Setting this option causes the debayering algorithm to interpret the top left pixel as green and the next pixel as blue.
Setting this option causes the debayering algorithm to interpret the top left pixel as green and the next pixel as red.
Setting this option causes the debayering algorithm to interpret the top left pixel as red and the next pixel as green.