问题
I am writing a code for watershed in OpenCV.
But i want the watershed boundaries to be 4 point connected and not 8 point.
Currently this is the interface:
void watershed(InputArray image, InputOutputArray markers)
Does anybody have any solution for this?
Also, is there any simple way to perform morphological watershed in opencv for automatic over-segmentation, the current one takes user input?
回答1:
OpenCV help for watershed does not explicitly explain the connectivity used in the function. It just refers to the paper MEYER, Fernand. Color image segmentation. In: Image Processing and its Applications, 1992., International Conference on. IET, 1992. p. 303-306.
Maybe you have to implement your own watershed algorithm, starting from the one available in OpenCV (OpenCV 2.4 implementation is here), or creating a new one; for example the following paper describes an algorithm where the connectivity is properly highlighted:
VINCENT, Luc; SOILLE, Pierre. Watersheds in digital spaces: an efficient algorithm based on immersion simulations. IEEE transactions on pattern analysis and machine intelligence, 1991, 13.6: 583-598.
来源：https://stackoverflow.com/questions/20219670/opencv-watershed-4-point-connectivity