spacepaste

for s in range (0, hist.shape[1]):
for i in range (0, hist.shape[0], 2):
#if green
if hist[i,s] > hist[i+1,s]:
histimg[i,s,1] = (hist[i,s] - hist[i+1,s])
#red
else:
histimg[i,s,2] = hist[i+1,s] - hist[i,s]