Drawing Histogram in OpenCV-Python

Hi Friends, Do you want to draw a histogram for an image as below? The code: import cv2 import numpy as np img = cv2.imread('zzzyj.jpg') h = np.zeros((300,256,3)) bins = np.arange(256).reshape(256,1) color = [ (255,0,0),(0,255,0),(0,0,255) ] for ch, col in enumerate(color): hist_item = cv2.calcHist([img],[ch],None,[256],[0,256]) cv2.normalize(hist_item,hist_item,0,255,cv2.NORM_MINMAX) hist=np.int3

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