Learning OpenCV 4 Computer Vision with Python 3 - Third Edition

Understanding the parameters of cv2.calcBackProject

The cv2.calcBackProject function has the following signature:

calcBackProject(images, channels, hist, ranges,                scale[, dst]) -> dst

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 all should have the same bit depth (8-bit, 16-bit, or 32-bit) and the same size.
channels	This parameter must be the same as the channels parameter used in calcHist.
hist	This parameter is the histogram.
ranges	This parameter must be the same as the ranges parameter used in calcHist.
scale	This parameter is a scale factor. The back-projection ...