gen_image_proto — Create an image with a specified constant gray value.
gen_image_proto creates an output image ImageCleared with the constant gray value Grayval. If the input image is of type 'direction', gray values in result image that are not in the value range that is valid for 'direction' images are set to the value 255 to mark them as invalid. ImageCleared has the same dimensions and pixel type as the input image Image.
Image with constant gray value.
Gray value to be used for the output image.
Default value: 0
Suggested values: 0, 1, 2, 5, 10, 16, 32, 64, 128, 253, 254, 255
gen_image_proto returns 2 (H_MSG_TRUE) if all parameters are correct. If necessary, an exception is raised.
set_grayval, paint_gray, gen_image_const, copy_image