Closing a contour curve in OpenCV
contour, curve, edge-detection, opencv
Solution
Using PolyLine method to draw contours
cv2.PolyLine(img, points, is_closed=True, 255, thickness=1, lineType=8, shift=0)
Read the docs for further details: http://docs.opencv.org/2.4/modules/core/doc/drawing_functions.html
Mark answered if it resolved your problem. If not then let me know.
Problem
I'm using OpenCV (Canny + findCountours) to find external contours of objects. The curve drawn is typically almost, but not entirely, closed. I'd like to close it - to find the region it bounds. How do I do this? Things considered: - Dilation - the examples I've seen show this after Canny, although it would seem to me it makes more sense to do this after findContours - Convex hull - might work, though I'm really trying to complete a curve - Shape simplification - related, but not exactly what I want