Region Features

Computes the number of pixels contained in a region.

Computes the smallest box containing a region; returns NIL if the region is empty.

Computes the smallest circle enclosing a region; returns NIL if the region is empty.

Computes the smallest ellipse enclosing a region; returns NIL if the region is empty.

Computes the smallest rectangle containing a region.

Computes the smallest rectangle with the given orientation angle containing a region; returns NIL if the region is empty.

Computes the longest and the shortest width of the input region measured as distance between parallel lines containing the whole region.

Calculates how much the input region's perimeter is bigger than the perimeter of a circle of the same area.

Computes the area of a region divided by area of its convex hull.

Directional standard deviation of the distance of the region's points to the center.

Computes axes of an ellipse having the same first and second order moments as the given region.

Computes the feature value of the input region.

Fills a ridges region with convex basins.

Computes the largest circle contained in a region.

Computes a point with coordinates equal to the average coordinates of the region's pixels; returns NIL if the region is empty.

Computes selected second-order moment of a region in regular and normalized ( divided by region area ) variant.

Computes the orientation of a region as an angle of value in a proper range.

Returns the lengths of horizontal sequences of locations that constitute the input region.

Computes the area of a region divided by the area of its bounding rectangle.

Directional standard deviation of the distance of the region's points to the center.