GetShearBound

Computes the bounding rectangle for the source ROI transformed by the ippiShear function.

Syntax

IppStatus ippiGetShearBound(IppiRect srcRoi, double bound[2][2], double xShear, double yShear, double xShift, double yShift);

Parameters

srcRoi	Region of interest in the source image (of the IppiRect type).
bound	Output array. Contains vertex coordinates of the bounding rectangle for the transformed source ROI.
xShear, yShear	Shearing transform coefficients.
xShift, yShift	Additional shift values along the horizontal and vertical axes.

Description

The function ippiGetShearBound is declared in the ippi.h file. It operates with ROI (see ROI Processing in Geometric Transforms).

This function is used as a support function for ippiShear. It computes vertex coordinates of the smallest bounding rectangle for the quadrangle quad, to which the source ROI is mapped by the shearing transform function ippiShear using coefficients xShear, yShear and shift values xShift, yShift.

bound[0] specifies x, y coordinates of the top-left corner, bound[1] specifies x, y coordinates of the bottom-right corner.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsCoeffErr	Indicates an error condition if xShear*yShear = 1.
ippStsSizeErr	Indicates an error condition if srcRoi has a size field with zero or negative value.