問題描述

cv2.error: OpenCV(4.5.1) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-r2ue8w6k\opencv\modules\imgproc\src\shapedescr.cpp:874: error: (-215:Assertion failed) npoints >= 0 && (depth == CV_32F || depth == CV_32S) in function 'cv::pointSetBoundingRect'

or

ValueError: not enough values to unpack (expected 3, got 2)?

解決方案

In OpenCV 3.4:

image, contours, hierarchy= cv2.findContours(image, mode, method[, contours[, hierarchy[, offset]]])

修改為

In OpenCV 4.0:

contours, hierarchy= cv2.findContours(image, mode, method[, contours[, hierarchy[, offset]]])

參考文章?

error: (-215:Assertion failed) npoints >= 0 && (depth == CV_32F || depth == CV_32F || depth ==CV_32S

OpenCV Assertion failed: (-215:Assertion failed) npoints >= 0 && (depth == CV_32F || depth == CV_32S)

總結

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