Basically I would like to change the line by a character string (for instance a sequence of A). For that I need to overload the drawContours function. Does anyone have an idea how to prodeed ?
Change the caracteristic of the line drawn by OpenCV drawContours in Python
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Finaly I decided to use C++.
I have retrieved all the (x,y) contours coordinates and used putText to print text following the contour line.
The same method could also be use with python.