defects = cv2.convexityDefects(cnt, hull)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cv2.error: OpenCV(4.8.1) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\convhull.cpp:319: error: (-215:Assertion failed) npoints >= 0 in function 'cv::convexityDefects'字符串
我尝试通过确保contours和船体变量具有有效值并且它们的长度大于或等于3来解决这个问题，然后将它们传递给cv2.convexityDefects函数。
if cnt is not None and hull is not None and len(cnt) >= 3 and len(hull) >= 3:
defects = cv2.convexityDefects(cnt, hull)
else:
print("Invalid contour or not enough points in the contour or hull.")
defects = None
# finding convexity defects
defects = cv2.convexityDefects(cnt, hull)
count_defects = 0
cv2.drawContours(thresh1, contours, -1, (0, 255, 0), 3) # to draw all contours pass -1型
1条答案
按热度按时间rnmwe5a21#
我已经检查了
cv::convexityDefects的源代码，错误可能来自npoints = points.checkVector(2, CV_32S);必须将变量作为有符号32位整数（np.int32）和正确的形状（N，2）传递。