histo_2dimhisto_2dimHisto2dimHisto2dimhisto_2dim (算子)

名称

histo_2dimhisto_2dimHisto2dimHisto2dimhisto_2dim — 计算双通道灰度图像的直方图。

签名

histo_2dim(Regions, ImageCol, ImageRow : Histo2Dim : : )

描述

算子 histo_2dimhisto_2dimHisto2dimHisto2dimHisto2dimhisto_2dim calculates the 2-dimensional histogram of two images within RegionsRegionsRegionsRegionsregionsregions. The gray values of channel 1 (ImageColImageColImageColImageColimageColimage_col) are interpreted as row index, those of channel 2 (ImageRowImageRowImageRowImageRowimageRowimage_row) as column index. The gray value at one point P(g1,g2) in the output image Histo2DimHisto2DimHisto2DimHisto2Dimhisto2Dimhisto_2dim indicates the frequency of the gray value combination (g1,g2) with g1 indicating the line index and g2 the column index.

注意

Note that the operator histo_2dimhisto_2dimHisto2dimHisto2dimHisto2dimhisto_2dim only considers the given RegionsRegionsRegionsRegionsregionsregions and ignores any previously set domain of the input images.

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）。
未采用并行化处理。

参数

RegionsRegionsRegionsRegionsregionsregions (输入对象) region(-array) → object

Region in which the histogram is to be calculated.

ImageColImageColImageColImageColimageColimage_col (输入对象) (multichannel-)image → object (byte / direction / cyclic / int1)

Channel 1.

ImageRowImageRowImageRowImageRowimageRowimage_row (输入对象) (multichannel-)image → object (byte / direction / cyclic / int1)

Channel 2.

Histo2DimHisto2DimHisto2DimHisto2Dimhisto2Dimhisto_2dim (输出对象) image → object (int4)

Histogram to be calculated.

示例（HDevelop）

read_image(Image,'monkey')
get_domain (Image, Domain)
gauss_filter (Image, ImageGauss, 7)
histo_2dim(Domain,ImageGauss, Image,Histo2Dim)
dev_display(Histo2Dim)

示例（C）

read_image(&Image,"monkey");
get_domain (Image, &Domain)
gauss_filter(Image,&ImageGauss,7);
histo_2dim(Domain,Image,ImageGauss,&Histo2Dim);
set_part(WindowHandle,0,0,511,511);
disp_image(Histo2Dim,WindowHandle);

示例（HDevelop）

read_image(Image,'monkey')
get_domain (Image, Domain)
gauss_filter (Image, ImageGauss, 7)
histo_2dim(Domain,ImageGauss, Image,Histo2Dim)
dev_display(Histo2Dim)

示例（HDevelop）

read_image(Image,'monkey')
get_domain (Image, Domain)
gauss_filter (Image, ImageGauss, 7)
histo_2dim(Domain,ImageGauss, Image,Histo2Dim)
dev_display(Histo2Dim)

示例（HDevelop）

read_image(Image,'monkey')
get_domain (Image, Domain)
gauss_filter (Image, ImageGauss, 7)
histo_2dim(Domain,ImageGauss, Image,Histo2Dim)
dev_display(Histo2Dim)

复杂度

If F is the plane of the region, the runtime complexity is O(F + 256^2).

结果

算子 histo_2dimhisto_2dimHisto2dimHisto2dimHisto2dimhisto_2dim 返回值 2 ( H_MSG_TRUE) if both images have defined gray values.当输入为空（无可用输入图像）时可设置行为通过算子 set_system(::'no_object_result',<Result>:)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)set_system("no_object_result",<Result>), the behavior in case of empty region is set via set_system(::'empty_region_result',<Result>:)set_system("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)set_system("empty_region_result",<Result>)。如有必要，则抛出异常。

可能的前趋

decompose3decompose3Decompose3Decompose3Decompose3decompose3, decompose2decompose2Decompose2Decompose2Decompose2decompose2, draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region

可能的后继

thresholdthresholdThresholdThresholdThresholdthreshold, class_2dim_supclass_2dim_supClass2dimSupClass2dimSupClass2dimSupclass_2dim_sup, pouringpouringPouringPouringPouringpouring, local_maxlocal_maxLocalMaxLocalMaxLocalMaxlocal_max, gray_skeletongray_skeletonGraySkeletonGraySkeletonGraySkeletongray_skeleton

替代

gray_histogray_histoGrayHistoGrayHistoGrayHistogray_histo, gray_histo_absgray_histo_absGrayHistoAbsGrayHistoAbsGrayHistoAbsgray_histo_abs

另见

get_grayvalget_grayvalGetGrayvalGetGrayvalGetGrayvalget_grayval

模块

基础

算子