HALCON Reference Manual 10.0.2

Name

gray_erosiongray_erosiongray_erosionGrayErosionGrayErosion — Perform a gray value erosion on an image.

Signature

gray_erosion(Image, SE : ImageErosion : : )

gray_erosiongray_erosiongray_erosionGrayErosionGrayErosion applies a gray value erosion to the input image ImageImageImageImageimage with the structuring element SESESESESE. The image type of the structuring element SESESESESE must match the image type of the input image ImageImageImageImageimage. The gray value erosion of an image i with a structuring element s at the pixel position x is defined as:

  (i-s)(x) =  min { f(x+z)-s(z) | z in S }

Here, S is the domain of the structuring element s (see read_gray_seread_gray_seread_gray_seReadGraySeReadGraySe).

The gray value erosion is particularly fast for flat structuring elements, i.e., structuring elements with a constant gray level within their domain.

Parallelization

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Automatically parallelized on tuple level.
Automatically parallelized on internal data level.

Parameters

ImageImageImageImageimage (input_object) (multichannel-)image(-array) → object (byte / uint2 / real)

Input image.

SESESESESE (input_object) singlechannelimage → object (byte / uint2 / real)

Structuring element.

ImageErosionImageErosionImageErosionImageErosionimageErosion (output_object) (multichannel-)image(-array) → object (byte / uint2 / real)

Gray-eroded image.

Result

gray_erosiongray_erosiongray_erosionGrayErosionGrayErosion returns 2 (H_MSG_TRUE) if the structuring element is not the empty region. Otherwise, an exception is raised.