Run fails on Arch Linux

[codingquark]

First issue is this line: contours, hierarchy = cv2.findContours(image, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)

This says too many values to unpack. Also changed the name of the image from yo to berry.

So I added one more variable and getting this error:

OpenCV Error: Assertion failed (npoints >= 0 && (depth == CV_32F || depth == CV_32S)) in contourArea, file /build/opencv/src/opencv-3.1.0/modules/imgproc/src/shapedescr.cpp, line 314
Traceback (most recent call last):
  File "demo.py", line 132, in <module>
    result = find_strawberry(image)
  File "demo.py", line 113, in find_strawberry
    big_strawberry_contour, mask_strawberries = find_biggest_contour(mask_clean)
  File "demo.py", line 38, in find_biggest_contour
    contour_sizes = [(cv2.contourArea(contour), contour) for contour in contours]
  File "demo.py", line 38, in <listcomp>
    contour_sizes = [(cv2.contourArea(contour), contour) for contour in contours]
cv2.error: /build/opencv/src/opencv-3.1.0/modules/imgproc/src/shapedescr.cpp:314: error: (-215) npoints >= 0 && (depth == CV_32F || depth == CV_32S) in function contourArea

May be it is due to the OpenCV version I'm using, but I am not sure.

[Karmahero]

In order for demo.py to work with OpenCV 3, update these lines:

[35] _, contours, hierarchy = cv2.findContours(image, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)
[51] cv2.ellipse(image_with_ellipse, ellipse, green, 2, cv2.LINE_AA)

[codingquark]

Awesome. Thanks!