你有一个错字,而不是:
r = pix[x,y][0] #load r with pixel x,y g = pix[x,x][1] #load g with pixel x,x b = pix[x,x][2] #load b with pixel x,x
你要:
r = pix[x,y][0] g = pix[x,y][1] b = pix[x,y][2]