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phernady avatar phernady commented on August 11, 2024

error: (-215:Assertion failed) reader.ptr != NULL in function 'cvDrawContours'
line 39

I have the same issue.
Somehow the cv2 does not find the license plate as a contour with the original examle image.
Even removing the limit at the sorting, only a small part in the headlight is recognized.
Version: opencv-python==4.4.0.40

Maybe some tuning needed at the filtering or edging?

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whodanyalahmed avatar whodanyalahmed commented on August 11, 2024

same error
@GeekyPRAVEE please solve this issue

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arya312 avatar arya312 commented on August 11, 2024

yes im facing the same problem. the draw contour is not detecting any contour

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wild-civil avatar wild-civil commented on August 11, 2024

error: (-215:Assertion failed) reader.ptr != NULL in function 'cvDrawContours' line 39

I change the picture, and it worked.

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