dannystaple
commented
4 years ago Hello, first - it doesn't bother me to have book queries and inquiries. It's all good material to create an FAQ or improve things in follow-up books.
The callback set to none warning is unrelated to this- this is the cleanup code.
So I'm assuming this is the visual processing area. The OpenCV API has changed between the version I'd installed in the original book and now.
This code seems to work with a current version of OpenCV:
contours = cv2.findContours(masked, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)[0]
circles = [cv2.minEnclosingCircle(cnt) for cnt in contours]Some questions so I can try to reproduce this:
- Which version of Python are you running?
- How did you install OpenCV for python?
- What OpenCV packages do you get when you type
pip freezeorpip3 freeze? - What do you get if you add
print(repr(contours)before the circles line?
Onydus
Hello again, Danny
I hope you are well.
My apologies for bothering you again. I'm sure you have better things to do. However, I've come across a bit of a road block while working through this section of your book.
This is the error message being outputted into the console:
Again, resorting to copying the code directly from github, the only edit I have made to the original is this: "contours = cv2.findContours(contour_image, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)[0]" Suggested by you to a fellow reader on the raspberrypi forum.
I'm completely stumped.
Kind regards, Onydus