I'm sure this is easy, but I am having a difficult time finding the right search terms to find it on the Internet. Any help much appreciated.
3 dimensional array(x,y,rgb) which is a PIL image into a numpy array using 'asarray' function. I want to subtract the Red Value in an array cell from a neighboring Red Value cell. >>> pictArray[39][4] #pixel at 39 4 array([150, 140, 120], dtype=unint8) >>> pictArray[39][5] #pixel at 39 5 array([160, 150, 120], dtype=unint8) >>> pictArray[39][4][0] #red pixel 150 >>> pictArray[39][5[0] #neighboring red pixel 160 >>> pictArray[39][4] - pictArray[39][5] ) 246 # <--------------- ??? vs -10 How do I get the number -10? Does this have to do with the dtype? Thanks in advance, James Carnell
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