height_width_ratioheight_width_ratioHeightWidthRatioHeightWidthRatioheight_width_ratio (Operator)

Name

height_width_ratioheight_width_ratioHeightWidthRatioHeightWidthRatioheight_width_ratio — Compute the width, height, and aspect ratio of the surrounding rectangle parallel to the coordinate axes.

Signature

Description

The operator height_width_ratioheight_width_ratioHeightWidthRatioHeightWidthRatioheight_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 (Row1Row1Row1row1row_1,Column1Column1Column1column1column_1,Row2Row2Row2row2row_2,Column2Column2Column2column2column_2) (see smallest_rectangle1smallest_rectangle1SmallestRectangle1SmallestRectangle1smallest_rectangle1). Based on these values, height_width_ratioheight_width_ratioHeightWidthRatioHeightWidthRatioheight_width_ratio computes the width, height, and aspect ratio of the smallest surrounding rectangle as follows:

If more than one region is passed in RegionsRegionsRegionsregionsregions, the results are stored in tuples in the same order as the respective regions in the RegionsRegionsRegionsregionsregions. In case of empty regions, all parameters have the value 0 if no other behavior was set (see set_systemset_systemSetSystemSetSystemset_system).

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

Complexity

If F is the area of the region the mean runtime complexity is O(sqrt(F)).

Result

The operator height_width_ratioheight_width_ratioHeightWidthRatioHeightWidthRatioheight_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.

Possible Predecessors

thresholdthresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionconnection, runlength_featuresrunlength_featuresRunlengthFeaturesRunlengthFeaturesrunlength_features

Alternatives

smallest_rectangle1smallest_rectangle1SmallestRectangle1SmallestRectangle1smallest_rectangle1, smallest_rectangle2smallest_rectangle2SmallestRectangle2SmallestRectangle2smallest_rectangle2, region_featuresregion_featuresRegionFeaturesRegionFeaturesregion_features

See also

select_shapeselect_shapeSelectShapeSelectShapeselect_shape, smallest_circlesmallest_circleSmallestCircleSmallestCirclesmallest_circle, elliptic_axiselliptic_axisEllipticAxisEllipticAxiselliptic_axis, area_centerarea_centerAreaCenterAreaCenterarea_center

Module

Foundation