Table of Contents of Features/Regions

area_center Area and center of regions.
chord_distribution Distribute the chord lengths of a region.
circularity Shape factor for the roundness of a region.
compactness Shape factor for the compactness of a region.
connect_and_holes Number of connection components and holes
contlength Contour length of a region.
convexity Shape factor for the convexity of a region.
direction1 Pose relation of regions with regard to the coordinate axes.
direction2 Pose relation of regions.
elliptic_axis Parameter of the equivalent ellipse.
estimate_foe Calculate vanishing point from given alignments.
estimate_orientation Estimate the orientation of regions (letters).
euler_number Calculate Euler number.
excentricity Shape features derived from the ellipse parameters.
fetch_thickness Access the thickness of a region along the main axis.
get_region_index Index of all regions containing a given pixel.
hamming_distance Hamming distance between two regions.
has_shape Select regions of a given shape.
inner_circle Largest inner circle of a region.
inside_region1 Choose all regions containing a given pixel.
inside_region2 Test, ob eine Region einen gegebenen Punkt enthält.
max_distance Maximal distance between two boundary points of a region.
min_distance1 Minimum distance between two regions with the help of dilatation.
min_distance2 Minimum distance between the contour pixels of two regions each.
moments Geometric moments of regions.
moments_norm Geometric moments of regions.
neighbour Search direct neighbours.
num_chord Characteristic values for runlength coding of regions.
roundness Shape factors from contour.
select_shape Choose regions with the aid of shape features.
select_shape2 Choose regions having a certain relation to each other.
smallest_circle Smallest surrounding circle of a region.
smallest_rectangle1 Surrounding rectangle parallel to the coordinate axes.
smallest_rectangle2 Smallest surrounding rectangle with any orientation.


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