Operator Reference

HALCON Operator Reference / Morphology / Gray Values
ClassesClasses | | Operators

gray_tophatgray_tophatGrayTophatGrayTophatgray_tophat (Operator)

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

Signature

gray_tophat(Image, SE : ImageTopHat : : )

Herror gray_tophat(const Hobject Image, const Hobject SE, Hobject* ImageTopHat)

Herror T_gray_tophat(const Hobject Image, const Hobject SE, Hobject* ImageTopHat)

void GrayTophat(const HObject& Image, const HObject& SE, HObject* ImageTopHat)

HImage HImage::GrayTophat(const HImage& SE) const

static void HOperatorSet.GrayTophat(HObject image, HObject SE, out HObject imageTopHat)

HImage HImage.GrayTophat(HImage SE)

def gray_tophat(image: HObject, se: HObject) -> HObject

Description

gray_tophatgray_tophatGrayTophatGrayTophatgray_tophat 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_openingGrayOpeningGrayOpeninggray_opening). For the generation of structuring elements, see read_gray_seread_gray_seReadGraySeReadGraySeread_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

ImageImageImageimageimage (input_object)  (multichannel-)image(-array) → objectHImageHObjectHObjectHobject (byte / uint2 / real)

Input image.

SESESESEse (input_object)  singlechannelimage → objectHImageHObjectHObjectHobject (byte / uint2 / real)

Structuring element.

ImageTopHatImageTopHatImageTopHatimageTopHatimage_top_hat (output_object)  (multichannel-)image(-array) → objectHImageHObjectHObjectHobject * (byte / uint2 / real)

Top hat image.

Result

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

Possible Predecessors

read_gray_seread_gray_seReadGraySeReadGraySeread_gray_se, gen_disc_segen_disc_seGenDiscSeGenDiscSegen_disc_se, read_imageread_imageReadImageReadImageread_image

Possible Successors

thresholdthresholdThresholdThresholdthreshold

Alternatives

gray_openinggray_openingGrayOpeningGrayOpeninggray_opening

See also

gray_bothatgray_bothatGrayBothatGrayBothatgray_bothat, top_hattop_hatTopHatTopHattop_hat, gray_erosion_rectgray_erosion_rectGrayErosionRectGrayErosionRectgray_erosion_rect, sub_imagesub_imageSubImageSubImagesub_image

Module

Foundation

ClassesClasses | | Operators