Issue

[ammu11]

OpenCV Error: Assertion failed (scn == 3 || scn == 4) in cv::cvtColor, file C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp, line 11111
Traceback (most recent call last):
File "C:\advanced_lane_detection-master\calibrate_camera.py", line 80, in
mtx, dist = calibrate_camera()
File "C:\advanced_lane_detection-master\calibrate_camera.py", line 52, in calibrate_camera
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
cv2.error: C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:11111: error: (-215) scn == 3 || scn == 4 in function cv::cvtColor

[vamshireddyp]

For the Assertion failed (scn == 3 || scn == 4) in cv::cvtColor,

Can you check whether you are reading the image or not