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March 3, 2018 05:30
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Working OpenCV absdiff.dilate display
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import cv2 | |
# using pure OpenCV. | |
vs = cv2.VideoCapture(0) | |
# time.sleep(2.0) | |
lastFrame = None | |
while True: | |
# grab the frame from the VideoCapture | |
_, frame = vs.read() | |
# resize | |
frame = cv2.resize(frame, (800, 600), fx=0.5, fy=0.5, interpolation=cv2.INTER_LINEAR) | |
# greyscale | |
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) | |
# blur | |
gray = cv2.GaussianBlur(gray, (21, 21), 0) | |
if lastFrame is None: | |
lastFrame = gray | |
continue | |
# diff | |
frameDelta = cv2.absdiff(lastFrame, gray) | |
lastFrame = gray | |
thresh = cv2.threshold(frameDelta, 20, 255, cv2.THRESH_BINARY)[1] | |
# show the output frame | |
cv2.imshow("thresh", thresh) | |
key = cv2.waitKey(1) & 0xFF | |
# if the `q` key was pressed, break from the loop | |
if key == ord("q"): | |
break | |
cv2.destroyAllWindows() |
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