Learning OpenCV 4 Computer Vision with Python 3 - Third Edition

Understanding the parameters of cv2.calcHist

The cv2.calcHist function has the following signature:

calcHist(images, channels, mask, histSize, ranges[, hist[,         accumulate]]) -> hist

The following table contains descriptions of the parameters (adapted from the official OpenCV documentation):

Parameter	Description
images	This parameter is a list of one or more source images. They should all have the same bit depth (8-bit, 16-bit, or 32-bit) and the same size.
channels	This parameter is a list of the indices of the channels used to compute the histogram. For example, channels=[0] means that only the first channel (that is, the channel with index 0) is used to compute the histogram.
mask	This parameter is a mask. If it ...