gray_erosiongray_erosionGrayErosionGrayErosiongray_erosion (Operator)

Name

gray_erosiongray_erosionGrayErosionGrayErosiongray_erosion — Perform a gray value erosion on an image.

Signature

gray_erosion(Image, SE : ImageErosion : : )

Description

gray_erosiongray_erosionGrayErosionGrayErosionGrayErosiongray_erosion applies a gray value erosion to the input image ImageImageImageImageimageimage with the structuring element SESESESESEse. The image type of the structuring element SESESESESEse must match the image type of the input image ImageImageImageImageimageimage. The gray value erosion of an image i with a structuring element s at the pixel position x is defined as: Here, S is the domain of the structuring element s (see read_gray_seread_gray_seReadGraySeReadGraySeReadGraySeread_gray_se).

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

Execution Information

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 channel level.
Automatically parallelized on internal data level.

Parameters

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

Input image.

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

Structuring element.

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

Gray-eroded image.

Result

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