Cv Image. .mat in cv_image constructor current behavior compilation error with opencv version 4.0.0 and above. Here, you will learn how to read an image, how to display it and how to save it back.
You didn't post the error it gives. You'll see these types of errors when (1) your path to an input image is incorrect, returning in cv2.imread returning none or (2). Converting opencv images to ros image messages.
Reading images in color and grayscale color_img = cv2.imread('cat.jpeg') gray_img = cv2.imread displaying the image cv2.imshow('cat image', color_img) #.
All opencv functions, classes and data structures are declared inside cv namespace. You will learn these functions : Storing the key pressed by user k. In all the examples below.