Opencv Typeerror: Points Is Not A Numpy Array, Neither A Scalar

Basically, I have this code that detects changes in background and boxed them. When I run the code, I get this error: Traceback (most recent call last): File 'cam2.py', line 28,

Solution 1:

According to the findContour doc it returns two things:

cv2.findContours(image, mode, method[, contours[, hierarchy[, offset]]]) → contours, hierarchy

Change the line to:

contours, hierarchy = cv2.findContours(mask, cv2.RETR_LIST, cv2.CHAIN_APPROX_NONE) 

That may works!

Solution 2:

contours is actually a double-array. the outer one is the list of contours, the inner ones are the points of a single contour.

so, replace:

while contours:
    vertices = cv2.boundingRect(list(contours))

with:

for cnt in contours:
    vertices = cv2.boundingRect(cnt)

and drop the

contours = contours.h_next()

line (you probably confused cv2 with the old c-api/cv approach, which was using linked lists under the hood)