OpenCV Error: Assertion Failed (L.channels() == 1 && I.channels() == 1) In ConnectedComponents_sub1

I got the following error in OpenCV (python) and have googled a lot but have not been able to resolve. I would be grateful if anyone could provide me with some clue. OpenCV Error

Solution 1:

Let us analyze it:

Assertion failed (L.channels() == 1 && I.channels() == 1)

The images that you are passing to some function should be 1 channel (gray not color).

__extractPlantArea(plant_img)

That happened in your code exactly at the function called __extractPlantArea.

cv2.connectedComponentsWithStats

While you are calling the OpenCV function called connectedComponentsWithStats.

Conclusion:

Do not pass colorful (BGR) image to connectedComponentsWithStats