Hey guys, im tried drawing a circle on the midpoint of my line but there's no circle. It created a gap between the lines instead. Please advice thanks!
M = cv2.moments(ske)
centroid_x = int(M['m10']/M['m00'])
centroid_y = int(M['m01']/M['m00'])
cv2.circle(ske,(centroid_x,centroid_y), 5, (0,0,255), -1)
above is a binary (1 channel) image, -- you cannot draw something in color on that. only the 1st channel of your drawingcolor will be used, and that is 0, so you draw a black circle on black background.
solution1:
## draw a grey circle, so you have some contrast to both line & bg:
cv2.circle(ske, (centroid_x,centroid_y), 5, (127,0,0), -1)
solution2:
## convert to 3 channels, then draw your red circle into that:
bgr = cvtColor(ske, cv2.COLORGRAY2BGR)
cv2.circle(bgr, (centroid_x,centroid_y), 5, (0,0,255), -1)
Thank you ! i manage to get the grey circle from solution 1.
Asked: 2017-12-29 03:51:19 -0600
Seen: 3,470 times
Last updated: Dec 29 '17