Perspective Transform Utility Functions

Functions
NppStatus	nppiGetPerspectiveTransform (NppiRect oSrcROI, const double quad[4][2], double aCoeffs[3][3])
	Calculates perspective transform coefficients given source rectangular ROI and its destination quadrangle projection. More...
NppStatus	nppiGetPerspectiveQuad (NppiRect oSrcROI, double quad[4][2], const double aCoeffs[3][3])
	Calculates perspective transform projection of given source rectangular ROI. More...
NppStatus	nppiGetPerspectiveBound (NppiRect oSrcROI, double bound[2][2], const double aCoeffs[3][3])
	Calculates bounding box of the perspective transform projection of the given source rectangular ROI. More...

Detailed Description

Function Documentation

NppStatus nppiGetPerspectiveBound	(	NppiRect	oSrcROI,
		double	bound[2][2],
		const double	aCoeffs[3][3]
	)

Calculates bounding box of the perspective transform projection of the given source rectangular ROI.

Parameters

oSrcROI	Source ROI
bound	Bounding box of the transformed source ROI
aCoeffs	Perspective transform coefficients

Returns

Error codes:

• NPP_SIZE_ERROR Indicates an error condition if any image dimension has zero or negative value
• NPP_RECTANGLE_ERROR Indicates an error condition if width or height of the intersection of the oSrcROI and source image is less than or equal to 1
• NPP_COEFFICIENT_ERROR Indicates an error condition if coefficient values are invalid

NppStatus nppiGetPerspectiveQuad	(	NppiRect	oSrcROI,
		double	quad[4][2],
		const double	aCoeffs[3][3]
	)

Calculates perspective transform projection of given source rectangular ROI.

Parameters

oSrcROI	Source ROI
quad	Destination quadrangle
aCoeffs	Perspective transform coefficients

Returns

Error codes:

• NPP_SIZE_ERROR Indicates an error condition if any image dimension has zero or negative value
• NPP_RECTANGLE_ERROR Indicates an error condition if width or height of the intersection of the oSrcROI and source image is less than or equal to 1
• NPP_COEFFICIENT_ERROR Indicates an error condition if coefficient values are invalid

NppStatus nppiGetPerspectiveTransform	(	NppiRect	oSrcROI,
		const double	quad[4][2],
		double	aCoeffs[3][3]
	)

Calculates perspective transform coefficients given source rectangular ROI and its destination quadrangle projection.

Parameters

oSrcROI	Source ROI
quad	Destination quadrangle
aCoeffs	Perspective transform coefficients

Returns

Error codes:

• NPP_SIZE_ERROR Indicates an error condition if any image dimension has zero or negative value
• NPP_RECTANGLE_ERROR Indicates an error condition if width or height of the intersection of the oSrcROI and source image is less than or equal to 1
• NPP_COEFFICIENT_ERROR Indicates an error condition if coefficient values are invalid