HALCON Reference Manual 10.0.2

Name

gray_closinggray_closinggray_closingGrayClosingGrayClosing — Perform a gray value closing on an image.

Signature

gray_closing(Image, SE : ImageClosing : : )

gray_closinggray_closinggray_closingGrayClosingGrayClosing applies a gray value closing 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 closing of an image i with a structuring element s is defined as

  i +- s = (i + s) - transpose(s) ,

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

The gray value closing 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.

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

Gray-closed image.

Result

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