gray_tophatgray_tophatGrayTophatGrayTophatgray_tophat (Operator)

Name

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

Signature

gray_tophat(Image, SE : ImageTopHat : : )

Description

gray_tophatgray_tophatGrayTophatGrayTophatGrayTophatgray_tophat applies a gray value top hat transformation 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 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_openingGrayOpeningGrayOpeningGrayOpeninggray_opening). For the generation of structuring elements, see read_gray_seread_gray_seReadGraySeReadGraySeReadGraySeread_gray_se.

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

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

Input image.

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

Structuring element.

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

Top hat image.

Result

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