Python-based demonstration of color histograms in 2D and 3D at tody411/ColorHistogram. First glance indicates it is oriented towards camera-based images (RGB and HSV interfaces) though the underlying ...

b_hist = cv2.calcHist(bgr_planes, [0], None, [256], (0,256), accumulate=False) g_hist = cv2.calcHist(bgr_planes, [1], None, [256], (0,256), accumulate=False) r_hist ...