Features

List of Operators

`area_center_gray`
Compute the area and center of gravity of a region in a gray value image.
`cooc_feature_image`
Calculate a co-occurrence matrix and derive gray value features thereof.
`cooc_feature_matrix`
Calculate gray value features from a co-occurrence matrix.
`elliptic_axis_gray`
Compute the orientation and major axes of a region in a gray value image.
`entropy_gray`
Determine the entropy and anisotropy of images.
`estimate_noise`
Estimate the image noise from a single image.
`fit_surface_first_order`
Calculate gray value moments and approximation by a first order surface (plane).
`fit_surface_second_order`
Calculate gray value moments and approximation by a second order surface.
`fuzzy_entropy`
Determine the fuzzy entropy of regions.
`fuzzy_perimeter`
Calculate the fuzzy perimeter of a region.
`gen_cooc_matrix`
Calculate the co-occurrence matrix of a region in an image.
`gray_features`
Calculates gray value features for a set of regions.
`gray_histo`
Calculate the gray value distribution.
`gray_histo_abs`
Calculate the gray value distribution.
`gray_histo_range`
Calculate the gray value distribution of a single channel image within a certain gray value range.
`gray_projections`
Calculate horizontal and vertical gray-value projections.
`histo_2dim`
Calculate the histogram of two-channel gray value images.
`intensity`
Calculate the mean and deviation of gray values.
`min_max_gray`
Determine the minimum and maximum gray values within regions.
`moments_gray_plane`
Calculate gray value moments and approximation by a plane.
`plane_deviation`
Calculate the deviation of the gray values from the approximating image plane.
`select_gray`
Select regions based on gray value features.
`shape_histo_all`
Determine a histogram of features along all threshold values.
`shape_histo_point`
Determine a histogram of features along all threshold values.