OpenCV cv2.IMREAD_GRAYSCALE: Read Images in Grayscale

The 'cv2.IMREAD_GRAYSCALE' flag in OpenCV is used to read an image in grayscale format. This means the resulting image will have only one color channel, unlike a full-color RGB image which has three channels. Grayscale images have pixel values ranging from 0 to 255, where 0 represents black and 255 represents white. You can use this flag with the 'cv2.imread()' function to read an image in grayscale format.