2016-04-02 22:31:50 -0500 received badge ● Famous Question (source) 2015-12-02 11:30:30 -0500 received badge ● Student (source) 2015-09-17 07:49:31 -0500 received badge ● Notable Question (source) 2015-06-04 09:17:21 -0500 received badge ● Popular Question (source) 2014-03-04 04:28:57 -0500 received badge ● Nice Answer (source) 2014-03-04 04:23:37 -0500 received badge ● Teacher (source) 2014-03-04 04:07:38 -0500 received badge ● Self-Learner (source) 2014-03-04 03:42:21 -0500 commented answer How to save a rectangular ROI? Thanks for providing the C++ solution! I posted the Python solution myself. 2014-03-04 03:40:42 -0500 answered a question How to save a rectangular ROI? Python The OpenCV-Python interface uses NumPy arrays for image objects. So in Python you can do it as follows. First use cv2.boundingRect to get the bounding rectangle for a set of points (i.e. contours): x, y, width, height = cv2.boundingRect(contours[i])  You can then use NumPy indexing to get your ROI from the image: roi = img[y:y+height, x:x+width]  And save the ROI to a new file: cv2.imwrite("roi.png", roi)  2014-02-28 08:15:00 -0500 received badge ● Supporter (source) 2014-02-28 08:12:54 -0500 received badge ● Editor (source) 2014-02-28 06:39:42 -0500 asked a question How to save a rectangular ROI? I have extracted contours with cv2.findContours from a binary mask which I created using a segmentation algorithm. Each contour corresponds to an object in the image that I want to a save to a separate image file. How can I get a rectangular region of interest (ROI) from a set of points (e.g. contour) and save that ROI to a separate image? I use Python, but if you can post the answer for C++, that's also appreciated.