| Operators |
height_width_ratio — Compute the width, height, and aspect ratio of the surrounding rectangle parallel to the coordinate axes.
The operator height_width_ratio calculates the surrounding rectangle of all input regions (parallel to the coordinate axes). The surrounding rectangle is described by the coordinates of the corner pixels (Row1,Column1,Row2,Column2) (see smallest_rectangle1). Based on these values, height_width_ratio computes the width, height, and aspect ratio of the smallest surrounding rectangle as follows:
If more than one region is passed in Regions, the results are stored in tuples in the same order as the respective regions in the Regions. In case of empty regions, all parameters have the value 0 if no other behavior was set (see set_system).
Regions to be examined.
Height of the surrounding rectangle of the region.
Width of the surrounding rectangle of the region.
Aspect ratio of the surrounding rectangle of the region.
If F is the area of the region the mean runtime complexity is O(sqrt(F)).
The operator height_width_ratio returns the value 2 (H_MSG_TRUE) if the input is not empty. The behavior in case of empty input (no input regions available) is set via the operator set_system('no_object_result',<Result>). The behavior in case of empty region (the region is the empty set) is set via set_system('empty_region_result',<Result>). If necessary an exception is raised.
threshold, regiongrowing, connection, runlength_features
smallest_rectangle1, smallest_rectangle2, region_features
select_shape, smallest_circle, elliptic_axis, area_center
Foundation
| Operators |