How to get image width and height in OpenCV? [duplicate]

Question

I want to get image width and height, how can I do that in OpenCV?

For example:

Mat src = imread("path_to_image"); cout << src.width; 

Is that right?

Answer 1

You can use rows and cols:

cout << "Width : " << src.cols << endl; cout << "Height: " << src.rows << endl; 

or size():

cout << "Width : " << src.size().width << endl; cout << "Height: " << src.size().height << endl; 

or size

cout << "Width : " << src.size[1] << endl; cout << "Height: " << src.size[0] << endl; 

Answer 2

Also for openCV in python you can do:

img = cv2.imread('myImage.jpg') height, width, channels = img.shape