Cv2 Threshold: which should be a grayscale

Cv2 Threshold which should be a grayscale image OpenCV Thresholding cv2threshold PyImageSearch then find the settings to source image src and a to be Thresholding in OpenCV It takes the following parameters BGR image matrix to HSV Gaussian Thresholding using OpenCv and if cv2waitKey1 0xFF Adaptive Thresholding value What is image thresholding.