detecting circular black blobs in python using opencv

Question

I want to detect circular round black blobs in opencv2

detector = cv2.SimpleBlobDetector(params)

keypoints = detector.detect(im)

I am getting error:

keypoints = detector.detect(im)

TypeError: Incorrect type of self (must be 'Feature2D' or its derivative)

Possible duplicate of How to use Feature2D(such as SimpleBlobDetector) correctly? (Python + OpenCV) — user2518618
– user2518618, Commented Feb 22, 2018 at 20:35

Jeru Luke · Accepted Answer · 2022-07-31 09:22:41Z

0

You can use this instead:

detector = cv2.SimpleBlobDetector_create(params)

This changed with OpenCV version 2 onwards.

Jeru Luke

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answered Nov 1, 2019 at 15:27

Seb Squire

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