gray_openinggray_openingGrayOpeningGrayOpening (Operator)

Name

gray_openinggray_openingGrayOpeningGrayOpening — Perform a gray value opening on an image.

Signature

gray_opening(Image, SE : ImageOpening : : )

gray_openinggray_openingGrayOpeningGrayOpeningGrayOpening applies a gray value opening 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 opening of an image i with a structuring element s is defined as

i.e., an erosion of the image with s followed by a dilation with the transposed structuring element (see gray_erosiongray_erosionGrayErosionGrayErosionGrayErosion and gray_dilationgray_dilationGrayDilationGrayDilationGrayDilation). For the generation of structuring elements, see read_gray_seread_gray_seReadGraySeReadGraySeReadGraySe.

The gray value opening 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

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

Input image.

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

Structuring element.

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

Gray-opened image.

Result

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