gen_cooc_matrixgen_cooc_matrixGenCoocMatrixGenCoocMatrix (Operator)

Name

gen_cooc_matrixgen_cooc_matrixGenCoocMatrixGenCoocMatrix — Calculate the co-occurrence matrix of a region in an image.

Signature

gen_cooc_matrix(Regions, Image : Matrix : LdGray, Direction : )

Description

The operator gen_cooc_matrixgen_cooc_matrixGenCoocMatrixGenCoocMatrixGenCoocMatrix determines from the input regions how often the gray values i and j are located next to each other in a certain direction (0, 45, 90, 135 degrees), stores this number in the co-occurrence matrix at the locations (i,j) and (j,i) (the matrix is symmetrical), and finally scales the matrix with the number of entries. LdGrayLdGrayLdGrayLdGrayldGray indicates the number of gray values to be distinguished (namely ). Example: Input image with gray values 0 0 3 (scaled with LdGray=2) 1 1 2 1 2 3 Co-occurrence matrix (not scaled): 2 0 0 1 0 1 1 0 0: 0 2 2 0 135: 1 0 1 1 0 2 0 1 1 1 0 0 1 0 1 0 0 1 0 0 0 2 0 0 0 1 0 0 90: 2 2 1 0 45: 1 2 0 1 0 1 0 2 0 0 2 0 0 0 2 0 0 1 0 0

Attention

Note that the operator gen_cooc_matrixgen_cooc_matrixGenCoocMatrixGenCoocMatrixGenCoocMatrix only considers the given RegionsRegionsRegionsRegionsregions and ignores any previously set domain of the input image ImageImageImageImageimage.

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

RegionsRegionsRegionsRegionsregions (input_object) region(-array) → object

Region to be checked.

ImageImageImageImageimage (input_object) singlechannelimage → object (byte)

Image providing the gray values.

MatrixMatrixMatrixMatrixmatrix (output_object) image(-array) → object (real)

Co-occurrence matrix (matrices).

LdGrayLdGrayLdGrayLdGrayldGray (input_control) integer → (integer)

Number of gray values to be distinguished ().

Default value: 6

List of values: 1, 2, 3, 4, 5, 6, 7, 8

Typical range of values: LdGray LdGray LdGray LdGray ldGray (lin)

Minimum increment: 1

Recommended increment: 1

DirectionDirectionDirectionDirectiondirection (input_control) integer → (integer)

Direction of neighbor relation.

Default value: 0

List of values: 0, 45, 90, 135

Result

The operator gen_cooc_matrixgen_cooc_matrixGenCoocMatrixGenCoocMatrixGenCoocMatrix returns the value 2 (H_MSG_TRUE) if an image with defined gray values is entered 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>), 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 Predecessors

draw_regiondraw_regionDrawRegionDrawRegionDrawRegion, gen_circlegen_circleGenCircleGenCircleGenCircle, gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipse, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1, gen_rectangle2gen_rectangle2GenRectangle2GenRectangle2GenRectangle2, thresholdthresholdThresholdThresholdThreshold, erosion_circleerosion_circleErosionCircleErosionCircleErosionCircle, binomial_filterbinomial_filterBinomialFilterBinomialFilterBinomialFilter, gauss_filtergauss_filterGaussFilterGaussFilterGaussFilter, smooth_imagesmooth_imageSmoothImageSmoothImageSmoothImage, sub_imagesub_imageSubImageSubImageSubImage

Alternatives

cooc_feature_imagecooc_feature_imageCoocFeatureImageCoocFeatureImageCoocFeatureImage

Module

Foundation

Operators