mean_spmean_spMeanSpMeanSpmean_sp (算子)
名称
mean_spmean_spMeanSpMeanSpmean_sp — 抑制椒盐噪声。Sp：salt and pepper。
签名
Herror mean_sp(const Hobject Image, Hobject* ImageSPMean, const Hlong MaskWidth, const Hlong MaskHeight, const Hlong MinThresh, const Hlong MaxThresh)
Herror T_mean_sp(const Hobject Image, Hobject* ImageSPMean, const Htuple MaskWidth, const Htuple MaskHeight, const Htuple MinThresh, const Htuple MaxThresh)
描述
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, the operator
mean_spmean_spMeanSpMeanSpMeanSpmean_sp behaves like mean_imagemean_imageMeanImageMeanImageMeanImagemean_image except for the
running time.
算子 mean_spmean_spMeanSpMeanSpMeanSpmean_sp is used to suppress extreme gray
values (salt and pepper noise = white and black dots).
有关平滑滤波器概念的说明，请参阅 滤波器 / 平滑 一章的引言。
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).
请注意，若使用域缩减后的图像作为输入，滤波器算子可能会返回意外结果。请参阅 滤波器 一章
执行信息
- 多线程类型：可重入（与非独占算子并行运行）。
- 多线程作用域：全局（可从任何线程调用）。
- 在元组级别上自动并行化。
- 在通道级别上自动并行化。
- 在域级别上自动并行化。
参数
ImageImageImageImageimageimage (输入对象) (multichannel-)image(-array) → objectHImageHObjectHImageHobject (byte / uint2)
输入图像。
ImageSPMeanImageSPMeanImageSPMeanImageSPMeanimageSPMeanimage_spmean (输出对象) (multichannel-)image(-array) → objectHImageHObjectHImageHobject * (byte / uint2)
平滑后的图像。
MaskWidthMaskWidthMaskWidthMaskWidthmaskWidthmask_width (输入控制) extent.x → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Width of filter mask.
默认值：
3
建议值：
3, 5, 7, 9, 11
值范围：
MaskWidth
MaskWidth
MaskWidth
MaskWidth
maskWidth
mask_width
(lin)
最小增量：
2
建议增量：
2
限制：
odd(MaskWidth) && MaskWidth < width(Image) * 2
MaskHeightMaskHeightMaskHeightMaskHeightmaskHeightmask_height (输入控制) extent.y → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Height of filter mask.
默认值：
3
建议值：
3, 5, 7, 9, 11
值范围：
MaskHeight
MaskHeight
MaskHeight
MaskHeight
maskHeight
mask_height
(lin)
最小增量：
2
建议增量：
2
限制：
odd(MaskHeight) && MaskHeight < height(Image) * 2
MinThreshMinThreshMinThreshMinThreshminThreshmin_thresh (输入控制) integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Minimum gray value.
默认值：
1
建议值：
1, 5, 7, 9, 11, 15, 23, 31, 43, 61, 101
值范围：
0
≤
MinThresh
MinThresh
MinThresh
MinThresh
minThresh
min_thresh
MaxThreshMaxThreshMaxThreshMaxThreshmaxThreshmax_thresh (输入控制) integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Maximum gray value.
默认值：
254
建议值：
5, 7, 9, 11, 15, 23, 31, 43, 61, 101, 200, 230, 250, 254
限制：
MinThresh <= MaxThresh
示例（HDevelop）
read_image(Image,'mreut')
dev_display(Image)
mean_sp(Image,ImageMeansp,3,3,101,201)
dev_display(ImageMeansp)
示例（C）
read_image(&Image,"mreut");
disp_image(Image,WindowHandle);
mean_sp(Image,&ImageMeansp,3,3,101,201);
disp_image(ImageMeansp,WindowHandle);
示例（HDevelop）
read_image(Image,'mreut')
dev_display(Image)
mean_sp(Image,ImageMeansp,3,3,101,201)
dev_display(ImageMeansp)
示例（HDevelop）
read_image(Image,'mreut')
dev_display(Image)
mean_sp(Image,ImageMeansp,3,3,101,201)
dev_display(ImageMeansp)
示例（HDevelop）
read_image(Image,'mreut')
dev_display(Image)
mean_sp(Image,ImageMeansp,3,3,101,201)
dev_display(ImageMeansp)
可能的后继
disp_imagedisp_imageDispImageDispImageDispImagedisp_image
替代
mean_imagemean_imageMeanImageMeanImageMeanImagemean_image,
median_imagemedian_imageMedianImageMedianImageMedianImagemedian_image,
median_separatemedian_separateMedianSeparateMedianSeparateMedianSeparatemedian_separate,
eliminate_min_maxeliminate_min_maxEliminateMinMaxEliminateMinMaxEliminateMinMaxeliminate_min_max
另见
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
基础