intensityintensityIntensityIntensityintensity (算子名称)

名称

intensityintensityIntensityIntensityintensity — Calculate the mean and deviation of gray values.

参数签名

intensity(区域, Image : : : Mean, Deviation)

描述

The operator intensityintensityIntensityIntensityIntensityintensity calculates the mean and the deviation of the gray values in the input image within 区域区域区域区域区域区域. If R is a region, p a pixel from R with the gray value g(p) and F the plane (F = |R|), the features are defined by:

注意

Note that the operator intensityintensityIntensityIntensityIntensityintensity only considers the given 区域区域区域区域区域区域 and ignores any previously set domain of the input image ImageImageImageImageimageimage. The calculation of DeviationDeviationDeviationDeviationdeviationdeviation does not follow the usual definition if the region of the image contains only one pixel. In this case 0.0 is returned.

运行信息

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Automatically parallelized on tuple level.

参数表

区域区域区域区域区域区域 (input_object) region(-array) → object

Regions in which the features are calculated.

ImageImageImageImageimageimage (input_object) singlechannelimage → object (byte / direction / cyclic / int1 / int2 / uint2 / int4 / real)

Gray value image.

MeanMeanMeanMeanmeanmean (output_control) real(-array) → (real)

Mean gray value of a region.

DeviationDeviationDeviationDeviationdeviationdeviation (output_control) real(-array) → (real)

Deviation of gray values within a region.

Complexity

If F is the area of the region, the runtime complexity is O(F).

结果

The operator intensityintensityIntensityIntensityIntensityintensity returns the value 2 ( H_MSG_TRUE) . The behavior in case of empty input (no input images available) is set via the operator 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>). If necessary an exception is raised.

可能的后置算子

thresholdthresholdThresholdThresholdThresholdthreshold

可替代算子

select_grayselect_graySelectGraySelectGraySelectGrayselect_gray, min_max_graymin_max_grayMinMaxGrayMinMaxGrayMinMaxGraymin_max_gray

参考其它

mean_imagemean_imageMeanImageMeanImageMeanImagemean_image, gray_histogray_histoGrayHistoGrayHistoGrayHistogray_histo, gray_histo_absgray_histo_absGrayHistoAbsGrayHistoAbsGrayHistoAbsgray_histo_abs

模块

Foundation