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zhunhung/contour_detection.py

Created October 17, 2019 15:13
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Find contours in an image
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contour_detection.py
# convert image to grayscale
imgray = cv2.cvtColor(img, cv.COLOR_BGR2GRAY)
# apply threshold
thresh = cv2.threshold(imgray, 127, 255, 0)[1]
# find contours
contours, hierarchy = cv.findContours(thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
# draw contours on image
cv2.drawContours(img, contours, -1, (0, 255, 0), 3)
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