gray_tophatgray_tophatGrayTophatGrayTophat (Operator)

Name

gray_tophatgray_tophatGrayTophatGrayTophat — Perform a gray value top hat transformation on an image.

Signature

gray_tophat(Image, SE : ImageTopHat : : )

gray_tophatgray_tophatGrayTophatGrayTophatGrayTophat applies a gray value top hat transformation 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 top hat transformation of an image i with a structuring element s is defined as

i.e., the difference of the image and its opening with s (see gray_openinggray_openingGrayOpeningGrayOpeningGrayOpening). For the generation of structuring elements, see read_gray_seread_gray_seReadGraySeReadGraySeReadGraySe.

The top hat transformation 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.

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

Top hat image.

Result

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