OpenCV - How to find rectangle contour of a rectangle with round corner?

Question

I\'m trying to find the contour of a rectangle object with round corner in a image. I tried HoughLinesP and findContours, but did not achieve the d

Answer 1

You can find bounding rectangle of nonzero points.

image = cv2.imread("./img/findrect0.png", 1)
gray = util.grayImage(image)
gray_inv = cv2.bitwise_not(gray)
points = cv2.findNonZero(gray)
rect = cv2.boundingRect(points)