gray_openinggray_openingGrayOpeningGrayOpeninggray_opening (Operator)

Name

gray_openinggray_openingGrayOpeningGrayOpeninggray_opening — Perform a gray value opening on an image.

Signature

gray_opening(Image, SE : ImageOpening : : )

Description

gray_openinggray_openingGrayOpeningGrayOpeningGrayOpeninggray_opening applies a gray value opening 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 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_erosionGrayErosionGrayErosionGrayErosiongray_erosion and gray_dilationgray_dilationGrayDilationGrayDilationGrayDilationgray_dilation). For the generation of structuring elements, see read_gray_seread_gray_seReadGraySeReadGraySeReadGraySeread_gray_se.

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

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

Input image.

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

Structuring element.

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

Gray-opened image.

Result

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