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diff = cv2.absdiff(frame1, frame2) TypeError: Expected Ptrcv::UMat for argument ‘src2’ #20015

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Shashi-tech-eng opened this issue Apr 30, 2021 · 2 comments
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question (invalid tracker) ask questions and other "no action" items here: https://forum.opencv.org

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@Shashi-tech-eng
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import cv2

import numpy as np

cap = cv2.VideoCapture(‘people.mp4’)

ret,frame1=cap.read()

ret,frame2=cap.read()

print(frame1.shape)

print(frame2.shape)

#cv2.imshow(“frame2”,frame2)

while cap.isOpened():

diff = cv2.absdiff(frame1, frame2)

gray = cv2.cvtColor(diff,cv2.COLOR_BGR2GRAY)

blur = cv2.GaussianBlur(gray,(5,5),0)

_,thres=cv2.threshold(blur,20,255,cv2.THRESH_BINARY)

dilated=cv2.dilate(thres,None,iterations=3)

contours,_=cv2.findContours(dilated,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)

for contour in contours:

(x, y, w, h) = cv2.boundingRect(contour)

if cv2.contourArea(contour) < 1000:

    continue

cv2.rectangle(frame1, (x, y), (x+w, y+h), (0, 255, 0), 2)

cv2.putText(frame1, "Status: {}".format('Movement'), (10, 20), cv2.FONT_HERSHEY_SIMPLEX,

            1, (0, 0, 255), 3)

#cv2.drawContours(frame1,contours,-1,(0,255,0),2)

image = cv2.resize(frame1, (1280,720))

cv2.imshow("feed", frame1)

frame1=frame2

frame2=cap.read()

if cv2.waitKey(40)==27:

break

cv2.destroyAllWindows()

cap.release()

This is code but getting

diff = cv2.absdiff(frame1, frame2)
TypeError: Expected Ptrcv::UMat for argument ‘src2’

@berak
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berak commented Apr 30, 2021

solved on the forum (empty frame in input)
can be closed, imho.

@sturkmen72
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Please close the issue.

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