cooc_feature_matrixcooc_feature_matrixCoocFeatureMatrixCoocFeatureMatrixcooc_feature_matrix (Operator)

Name

cooc_feature_matrixcooc_feature_matrixCoocFeatureMatrixCoocFeatureMatrixcooc_feature_matrix — Calculate gray value features from a co-occurrence matrix.

Signature

Description

The operator cooc_feature_matrixcooc_feature_matrixCoocFeatureMatrixCoocFeatureMatrixCoocFeatureMatrixcooc_feature_matrix calculates from a co-occurrence matrix (CoocMatrixCoocMatrixCoocMatrixCoocMatrixcoocMatrixcooc_matrix) the energy (EnergyEnergyEnergyEnergyenergyenergy), correlation (CorrelationCorrelationCorrelationCorrelationcorrelationcorrelation), local homogeneity (HomogeneityHomogeneityHomogeneityHomogeneityhomogeneityhomogeneity) and contrast (ContrastContrastContrastContrastcontrastcontrast).

The operator cooc_feature_matrixcooc_feature_matrixCoocFeatureMatrixCoocFeatureMatrixCoocFeatureMatrixcooc_feature_matrix calculates the gray value features from the part of the input matrix generated by gen_cooc_matrixgen_cooc_matrixGenCoocMatrixGenCoocMatrixGenCoocMatrixgen_cooc_matrix corresponding to the direction matrix indicated by the parameters LdGrayLdGrayLdGrayLdGrayldGrayld_gray and DirectionDirectionDirectionDirectiondirectiondirection according to the following formulae:

• Energy (Measure for image homogeneity):

• Correlation (Measure for gray value dependencies):

• Local homogeneity:

• Contrast (Measure for the size of the intensity differences):

where

Width of CoocMatrixCoocMatrixCoocMatrixCoocMatrixcoocMatrixcooc_matrix,

Entry of co-occurrence matrix,

,

,

,

.

Attention

The region of the input image is disregarded.

Execution Information

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

Parameters

Result

The operator cooc_feature_matrixcooc_feature_matrixCoocFeatureMatrixCoocFeatureMatrixCoocFeatureMatrixcooc_feature_matrix returns the value TRUE if an image with defined gray values is passed and the parameters are correct. 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>). If necessary an exception is raised.

Possible Predecessors

gen_cooc_matrixgen_cooc_matrixGenCoocMatrixGenCoocMatrixGenCoocMatrixgen_cooc_matrix

Alternatives

cooc_feature_imagecooc_feature_imageCoocFeatureImageCoocFeatureImageCoocFeatureImagecooc_feature_image

See also

intensityintensityIntensityIntensityIntensityintensity, min_max_graymin_max_grayMinMaxGrayMinMaxGrayMinMaxGraymin_max_gray, entropy_grayentropy_grayEntropyGrayEntropyGrayEntropyGrayentropy_gray, select_grayselect_graySelectGraySelectGraySelectGrayselect_gray

Module

Foundation