Image Arithmetic

AVERAGE/AVERAGE 		 Compute simple average of all pixels in a subimage 
AVERAGE/COLUMN 		 Compute average of image columns 
AVERAGE/IMAGE 		 Calculate the average of images 
AVERAGE/ROW 		 Compute average of image rows 
AVERAGE/WINDOW 		 Compare images, then take the meaning 
COMPUTE/COLUMN 		 Perform arithmetic expression on image column 
COMPUTE/IMAGE 		 Compute arithmetic expression of images 
COMPUTE/PIXEL 		 Perform arithmetic operations on images using
		 pixel coordinates 
COMPUTE/ROW 		 Compute arithmetic expression on image scan lines
COMPUTE/..PLANE 		 Do arithmatic on planes of a data cube