gray_erosion — Perform a gray value erosion on an image.
gray_erosion applies a gray value erosion to the input image Image with the structuring element SE. The image type of the structuring element SE must match the image type of the input image Image. The gray value erosion of an image i with a structuring element s at the pixel position x is defined as:
The gray value erosion is particularly fast for flat structuring elements, i.e., structuring elements with a constant gray level within their domain.
gray_erosion returns 2 (H_MSG_TRUE) if the structuring element is not the empty region. Otherwise, an exception is raised.
read_gray_se, gen_disc_se, read_image
gray_opening, gray_closing, erosion1, gray_skeleton