I am trying to do a simple area calculation of contours I get from findContours.
My openCv version is 3.1.0
My code is:
cc = cv2.findContours(im_bw.copy(), cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
cv2.contourArea(cc[0])
error: 'C:\builds\master_PackSlaveAddon-win32-vc12-static\opencv\modules\imgproc\src\shapedescr.cp...: error: (-215) npoints >= 0 && (depth == CV_32F || depth == CV_32S) in function cv::contourArea
'
Cant seem to solve it, I have a feeling its just typecasting altough I expect the findContours result to match the type of contourArea
Thanks :)
EDIT: turns out I need to take the 2nd argument of findContours
im2, cc, hierarchy = cv2.findContours(im_bw.copy(), cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
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