Operator Reference

HALCON Operator Reference / Filters / Smoothing

• HDevelop
• .NET
• Python
• C++
• C

ClassesClasses | | Operators

eliminate_speliminate_spEliminateSpEliminateSpeliminate_sp (Operator)

eliminate_speliminate_spEliminateSpEliminateSpeliminate_sp — Replace values outside of thresholds with average value.

Signature

eliminate_sp(Image : ImageFillSP : MaskWidth, MaskHeight, MinThresh, MaxThresh : )

Herror eliminate_sp(const Hobject Image, Hobject* ImageFillSP, const Hlong MaskWidth, const Hlong MaskHeight, const Hlong MinThresh, const Hlong MaxThresh)

Herror T_eliminate_sp(const Hobject Image, Hobject* ImageFillSP, const Htuple MaskWidth, const Htuple MaskHeight, const Htuple MinThresh, const Htuple MaxThresh)

void EliminateSp(const HObject& Image, HObject* ImageFillSP, const HTuple& MaskWidth, const HTuple& MaskHeight, const HTuple& MinThresh, const HTuple& MaxThresh)

HImage HImage::EliminateSp(Hlong MaskWidth, Hlong MaskHeight, Hlong MinThresh, Hlong MaxThresh) const

static void HOperatorSet.EliminateSp(HObject image, out HObject imageFillSP, HTuple maskWidth, HTuple maskHeight, HTuple minThresh, HTuple maxThresh)

HImage HImage.EliminateSp(int maskWidth, int maskHeight, int minThresh, int maxThresh)

def eliminate_sp(image: HObject, mask_width: int, mask_height: int, min_thresh: int, max_thresh: int) -> HObject

Description

The operator eliminate_speliminate_spEliminateSpEliminateSpeliminate_sp replaces all gray values outside the indicated gray value intervals (MinThreshMinThreshMinThreshminThreshmin_thresh to MaxThreshMaxThreshMaxThreshmaxThreshmax_thresh) with the neighboring mean values. Only those neighboring pixels which also fall within the gray value interval are used for averaging. If no such pixel is present in the vicinity the original gray value is used. The gray values in the input image falling within the gray value interval are also adopted without change.

For an explanation of the concept of smoothing filters see the introduction of chapter Filters / Smoothing.

Attention

If even values instead of odd values are given for MaskHeightMaskHeightMaskHeightmaskHeightmask_height or MaskWidthMaskWidthMaskWidthmaskWidthmask_width, the routine uses the next larger odd values instead (this way the center of the filter mask is always explicitly determined).

Note that filter operators may return unexpected results if an image with a reduced domain is used as input. Please refer to the chapter Filters.

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 domain level.

Parameters

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

Input image.

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

Smoothed image.

MaskWidthMaskWidthMaskWidthmaskWidthmask_width (input_control)  extent.x → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Width of filter mask.

Default: 3

Suggested values: 3, 5, 7, 9, 11

Value range: 3 ≤ MaskWidth MaskWidth MaskWidth maskWidth mask_width (lin)

Minimum increment: 2

Recommended increment: 2

Restriction: odd(MaskWidth) && MaskWidth < width(Image) * 2

MaskHeightMaskHeightMaskHeightmaskHeightmask_height (input_control)  extent.y → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Height of filter mask.

Default: 3

Suggested values: 3, 5, 7, 9, 11

Value range: 3 ≤ MaskHeight MaskHeight MaskHeight maskHeight mask_height (lin)

Minimum increment: 2

Recommended increment: 2

Restriction: odd(MaskHeight) && MaskHeight < height(Image) * 2

MinThreshMinThreshMinThreshminThreshmin_thresh (input_control)  integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Minimum gray value.

Default: 1

Suggested values: 1, 5, 7, 9, 11, 15, 23, 31, 43, 61, 101

MaxThreshMaxThreshMaxThreshmaxThreshmax_thresh (input_control)  integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Maximum gray value.

Default: 254

Suggested values: 5, 7, 9, 11, 15, 23, 31, 43, 61, 101, 200, 230, 250, 254

Restriction: MinThresh <= MaxThresh

Example (HDevelop)

read_image(Image,'mreut')
dev_display(Image)
eliminate_sp(Image,ImageFillSP,3,3,101,201)
dev_display(ImageFillSP)

Example (C)

read_image(&Image,"mreut");
disp_image(Image,WindowHandle);
eliminate_sp(Image,&ImageFillSP,3,3,101,201);
disp_image(ImageFillSP,WindowHandle);

Example (HDevelop)

read_image(Image,'mreut')
dev_display(Image)
eliminate_sp(Image,ImageFillSP,3,3,101,201)
dev_display(ImageFillSP)

Example (HDevelop)

read_image(Image,'mreut')
dev_display(Image)
eliminate_sp(Image,ImageFillSP,3,3,101,201)
dev_display(ImageFillSP)

Possible Successors

disp_imagedisp_imageDispImageDispImagedisp_image

Alternatives

mean_spmean_spMeanSpMeanSpmean_sp, mean_imagemean_imageMeanImageMeanImagemean_image, median_imagemedian_imageMedianImageMedianImagemedian_image, eliminate_min_maxeliminate_min_maxEliminateMinMaxEliminateMinMaxeliminate_min_max

See also

binomial_filterbinomial_filterBinomialFilterBinomialFilterbinomial_filter, gauss_filtergauss_filterGaussFilterGaussFiltergauss_filter, smooth_imagesmooth_imageSmoothImageSmoothImagesmooth_image, anisotropic_diffusionanisotropic_diffusionAnisotropicDiffusionAnisotropicDiffusionanisotropic_diffusion, sigma_imagesigma_imageSigmaImageSigmaImagesigma_image, eliminate_min_maxeliminate_min_maxEliminateMinMaxEliminateMinMaxeliminate_min_max

Module

Foundation

---

ClassesClasses | | Operators