median_weightedmedian_weightedMedianWeightedMedianWeightedmedian_weighted (算子名称)
名称
median_weightedmedian_weightedMedianWeightedMedianWeightedmedian_weighted — Weighted median filtering with different rank masks.
参数签名
描述
该算子 median_weightedmedian_weightedMedianWeightedMedianWeightedMedianWeightedmedian_weighted calculates the median of
the gray values within a local environment. In contrast to
median_imagemedian_imageMedianImageMedianImageMedianImagemedian_image, which uses all gray values within the
environment exactly once, 该算子 median_weightedmedian_weightedMedianWeightedMedianWeightedMedianWeightedmedian_weighted
weights all gray values several times depending on their position.
A gray value is received into the field to be sorted several times
according to its weighting. The following masks are available:
- 'gauss'
(MaskSizeMaskSizeMaskSizeMaskSizemaskSizemask_size = 3)
1 2 1
2 4 2
1 2 1
- 'inner'
(MaskSizeMaskSizeMaskSizeMaskSizemaskSizemask_size = 3)
1 1 1
1 3 1
1 1 1
该算子 median_weightedmedian_weightedMedianWeightedMedianWeightedMedianWeightedmedian_weighted means that, contrary to
median_imagemedian_imageMedianImageMedianImageMedianImagemedian_image, gray value corners remain.
For an explanation of the concept of smoothing filters see the introduction
of chapter Filters / Smoothing.
注意
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) → objectHImageHObjectHImageHobject (byte / int2 / uint2)
Image to be filtered.
ImageWMedianImageWMedianImageWMedianImageWMedianimageWMedianimage_wmedian (output_object) (multichannel-)image(-array) → objectHImageHObjectHImageHobject * (byte / int2 / uint2)
Median filtered image.
MaskTypeMaskTypeMaskTypeMaskTypemaskTypemask_type (input_control) string → HTuplestrHTupleHtuple (string) (string) (HString) (char*)
Type of median mask.
Default:
'inner'
"inner"
"inner"
"inner"
"inner"
"inner"
List of values:
'gauss'"gauss""gauss""gauss""gauss""gauss", 'inner'"inner""inner""inner""inner""inner"
MaskSizeMaskSizeMaskSizeMaskSizemaskSizemask_size (input_control) integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
mask size.
Default:
3
List of values:
3
例程 (HDevelop)
read_image(Image,'fabrik')
median_weighted(Image,MedianWeighted,'gauss',3)
dev_display(MedianWeighted)
例程 (C)
read_image(&Image,"fabrik");
median_weighted(Image,&MedianWeighted,"gauss",3);
disp_image(MedianWeighted,WindowHandle);
例程 (HDevelop)
read_image(Image,'fabrik')
median_weighted(Image,MedianWeighted,'gauss',3)
dev_display(MedianWeighted)
例程 (HDevelop)
read_image(Image,'fabrik')
median_weighted(Image,MedianWeighted,'gauss',3)
dev_display(MedianWeighted)
例程 (HDevelop)
read_image(Image,'fabrik')
median_weighted(Image,MedianWeighted,'gauss',3)
dev_display(MedianWeighted)
Complexity
For each pixel: O(F * log(F)) with F = area of MaskTypeMaskTypeMaskTypeMaskTypemaskTypemask_type.
可能的前置算子
read_imageread_imageReadImageReadImageReadImageread_image
可能的后置算子
thresholdthresholdThresholdThresholdThresholdthreshold,
dyn_thresholddyn_thresholdDynThresholdDynThresholdDynThresholddyn_threshold,
regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing
可替代算子
median_imagemedian_imageMedianImageMedianImageMedianImagemedian_image,
trimmed_meantrimmed_meanTrimmedMeanTrimmedMeanTrimmedMeantrimmed_mean,
sigma_imagesigma_imageSigmaImageSigmaImageSigmaImagesigma_image
References
R. Haralick, L. Shapiro; “Computer and Robot Vision”;
Addison-Wesley, 1992, Seite 319
模块
Foundation