intensityintensityIntensityIntensity (Operator)


intensityintensityIntensityIntensity — Calculate the mean and deviation of gray values.


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

Herror intensity(const Hobject Regions, const Hobject Image, double* Mean, double* Deviation)

Herror T_intensity(const Hobject Regions, const Hobject Image, Htuple* Mean, Htuple* Deviation)

void Intensity(const HObject& Regions, const HObject& Image, HTuple* Mean, HTuple* Deviation)

HTuple HImage::Intensity(const HRegion& Regions, HTuple* Deviation) const

double HImage::Intensity(const HRegion& Regions, double* Deviation) const

HTuple HRegion::Intensity(const HImage& Image, HTuple* Deviation) const

double HRegion::Intensity(const HImage& Image, double* Deviation) const

static void HOperatorSet.Intensity(HObject regions, HObject image, out HTuple mean, out HTuple deviation)

HTuple HImage.Intensity(HRegion regions, out HTuple deviation)

double HImage.Intensity(HRegion regions, out double deviation)

HTuple HRegion.Intensity(HImage image, out HTuple deviation)

double HRegion.Intensity(HImage image, out double deviation)


The operator intensityintensityIntensityIntensityIntensity calculates the mean and the deviation of the gray values in the input image within RegionsRegionsRegionsRegionsregions. 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:


Note that the operator intensityintensityIntensityIntensityIntensity only considers the given RegionsRegionsRegionsRegionsregions and ignores any previously set domain of the input image ImageImageImageImageimage. The calculation of DeviationDeviationDeviationDeviationdeviation does not follow the usual definition if the region of the image contains only one pixel. In this case 0.0 is returned.

Execution Information


RegionsRegionsRegionsRegionsregions (input_object)  region(-array) objectHRegionHRegionHobject

Regions in which the features are calculated.

ImageImageImageImageimage (input_object)  singlechannelimage objectHImageHImageHobject (byte / direction / cyclic / int1 / int2 / uint2 / int4 / real)

Gray value image.

MeanMeanMeanMeanmean (output_control)  real(-array) HTupleHTupleHtuple (real) (double) (double) (double)

Mean gray value of a region.

DeviationDeviationDeviationDeviationdeviation (output_control)  real(-array) HTupleHTupleHtuple (real) (double) (double) (double)

Deviation of gray values within a region.


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


The operator intensityintensityIntensityIntensityIntensity 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>), 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>). If necessary an exception is raised.

Possible Successors



select_grayselect_graySelectGraySelectGraySelectGray, min_max_graymin_max_grayMinMaxGrayMinMaxGrayMinMaxGray

See also

mean_imagemean_imageMeanImageMeanImageMeanImage, mean_imagemean_imageMeanImageMeanImageMeanImage, gray_histogray_histoGrayHistoGrayHistoGrayHisto, gray_histo_absgray_histo_absGrayHistoAbsGrayHistoAbsGrayHistoAbs