Can't parse 'center'. Sequence item with index 0 has a wrong type error using OpenCV

Asked Aug 12 '22 at 06:50

Active Aug 16 '22 at 00:44

Viewed 72 times

import cv2
import numpy as np
    
src = cv2.imread("cup.webp")
dst = src.copy()
    
gray = cv2.cvtColor(src, cv2.COLOR_RGB2GRAY)
corners = cv2.goodFeaturesToTrack(gray, 100, 0.01, 5, blockSize=3, useHarrisDetector=True, k=0.03)
    
for i in corners:
    cv2.circle(dst, tuple(i[0]), 3, (0, 0, 255), 2)
    
cv2.imshow("dst", dst)
cv2.waitKey(0)
cv2.destroyAllWindows()

I find the "Can't parse 'center'. Sequence item with index 0 has a wrong type error" when I run the code.

here is the image:

https://076923.github.io/assets/posts/Python/OpenCV/lecture-23/1.webp

edited Aug 16 '22 at 00:44

asked Aug 12 '22 at 06:50

Joshua Chung

please share the image that you are using. So we can help you out. – Usama Aleem Aug 12 '22 at 07:03
1

Does this answer your question? [(-5:Bad argument) in function 'rectangle' - Can't parse 'pt1'. Sequence item with index 0 has a wrong type](https://stackoverflow.com/questions/67921192/5bad-argument-in-function-rectangle-cant-parse-pt1-sequence-item-wit) – Christoph Rackwitz Aug 12 '22 at 07:33
please take the [tour] and review [ask] – Christoph Rackwitz Aug 12 '22 at 07:33
You cannot do this tuple(i[0]). You need coordinates. – toyota Supra Aug 13 '22 at 13:54
Does this help? cv2.circle(frame, (int(i[0]), int(i[1])), 2, (0, 0, 255), -1) – toyota Supra Aug 13 '22 at 13:57
Thanks for your comment. I solved this problem by doing the below. – Joshua Chung Aug 16 '22 at 00:29
for i in range(corners.shape[0]): pt = (int(corners[i, 0, 0]), int(corners[i, 0, 1])) cv2.circle(dst, pt, 3, (0, 0, 255), 2) – Joshua Chung Aug 16 '22 at 00:39

Can't parse 'center'. Sequence item with index 0 has a wrong type error using OpenCV

0 Answers0