How to select ROI in binary threshold area using opencv in python?

Question

I'm trying to crop the image from the binary image which is already processed from the original, suppose I have the original image

and I got the binary image from the original

and I want to crop the image only the white area using blob analysis

How can I do that?

Answer 1

In c++ you can use,

cv::Mat output_Mat = cv::Mat::zeros(RGB_Mat.size(), RGB_Mat.type());
RGB_Mat.copyTo(output_Mat, Binary_Mat);

Hope you can find corresponding python methods.

Answer 2

points = cv2.findNonZero(binary_image);
min_rect = cv2.boundingRect(points);