mean_spmean_spMeanSpMeanSpmean_sp (算子名称)

名称

mean_spmean_spMeanSpMeanSpmean_sp — Suppress salt and pepper noise.

参数签名

mean_sp(Image : ImageSPMean : MaskWidth, MaskHeight, MinThresh, MaxThresh : )

描述

该算子 mean_spmean_spMeanSpMeanSpMeanSpmean_sp carries out a smoothing by averaging the values. Only the gray values within the interval from MinThreshMinThreshMinThreshMinThreshminThreshmin_thresh to MaxThreshMaxThreshMaxThreshMaxThreshmaxThreshmax_thresh are averaged. Gray values which are too light or too dark are ignored during summation. If no gray value lies within the default interval during summation the original gray value is adopted. If the thresholds are set at 0 or 255, respectively, 该算子 mean_spmean_spMeanSpMeanSpMeanSpmean_sp behaves like mean_imagemean_imageMeanImageMeanImageMeanImagemean_image except for the running time.

该算子 mean_spmean_spMeanSpMeanSpMeanSpmean_sp is used to suppress extreme gray values (salt and pepper noise = white and black dots).

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

注意

If even values instead of odd values are given for MaskHeightMaskHeightMaskHeightMaskHeightmaskHeightmask_height or MaskWidthMaskWidthMaskWidthMaskWidthmaskWidthmask_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 过滤器.

运行信息

多线程类型:可重入(与非独占操作符并行运行)。
多线程作用域:全局(可以从任何线程调用)。
在元组级别自动并行化。
在图像通道级别自动并行化。
Automatically parallelized on domain level.

参数表

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

Input image.

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

Smoothed image.

MaskWidthMaskWidthMaskWidthMaskWidthmaskWidthmask_width (input_control) extent.x → (integer)

Width of filter mask.

Default: 3

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

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

Minimum increment: 2

Recommended increment: 2

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

MaskHeightMaskHeightMaskHeightMaskHeightmaskHeightmask_height (input_control) extent.y → (integer)

Height of filter mask.

Default: 3

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

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

Minimum increment: 2

Recommended increment: 2

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

MinThreshMinThreshMinThreshMinThreshminThreshmin_thresh (input_control) integer → (integer)

Minimum gray value.

Default: 1

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

Value range: 0 ≤ MinThresh MinThresh MinThresh MinThresh minThresh min_thresh

MaxThreshMaxThreshMaxThreshMaxThreshmaxThreshmax_thresh (input_control) integer → (integer)

Maximum gray value.

Default: 254

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

Restriction: MinThresh <= MaxThresh

例程 (HDevelop)

read_image(Image,'mreut')
dev_display(Image)
mean_sp(Image,ImageMeansp,3,3,101,201)
dev_display(ImageMeansp)

例程 (C)

read_image(&Image,"mreut");
disp_image(Image,WindowHandle);
mean_sp(Image,&ImageMeansp,3,3,101,201);
disp_image(ImageMeansp,WindowHandle);

例程 (HDevelop)

read_image(Image,'mreut')
dev_display(Image)
mean_sp(Image,ImageMeansp,3,3,101,201)
dev_display(ImageMeansp)

例程 (HDevelop)

read_image(Image,'mreut')
dev_display(Image)
mean_sp(Image,ImageMeansp,3,3,101,201)
dev_display(ImageMeansp)

例程 (HDevelop)

read_image(Image,'mreut')
dev_display(Image)
mean_sp(Image,ImageMeansp,3,3,101,201)
dev_display(ImageMeansp)

可能的后置算子

disp_imagedisp_imageDispImageDispImageDispImagedisp_image

可替代算子

mean_imagemean_imageMeanImageMeanImageMeanImagemean_image, median_imagemedian_imageMedianImageMedianImageMedianImagemedian_image, median_separatemedian_separateMedianSeparateMedianSeparateMedianSeparatemedian_separate, eliminate_min_maxeliminate_min_maxEliminateMinMaxEliminateMinMaxEliminateMinMaxeliminate_min_max

参考其它

anisotropic_diffusionanisotropic_diffusionAnisotropicDiffusionAnisotropicDiffusionAnisotropicDiffusionanisotropic_diffusion, sigma_imagesigma_imageSigmaImageSigmaImageSigmaImagesigma_image, binomial_filterbinomial_filterBinomialFilterBinomialFilterBinomialFilterbinomial_filter, gauss_filtergauss_filterGaussFilterGaussFilterGaussFiltergauss_filter, smooth_imagesmooth_imageSmoothImageSmoothImageSmoothImagesmooth_image, eliminate_min_maxeliminate_min_maxEliminateMinMaxEliminateMinMaxEliminateMinMaxeliminate_min_max

模块

Foundation

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