Intel® Integrated Performance Primitives (Intel® IPP) Developer Guide and Reference

ID 790148
Date 10/31/2024
Public
Document Table of Contents

WarpPerspectiveGetSize

Computes the size of the specification structure and the size of the external work buffer for the warp perspective transform.

Syntax

IppStatus ippiWarpPerspectiveGetSize(IppiSize srcSize, IppiRect srcRoi, IppiSize dstSize, IppDataType dataType, const double coeffs[3][3], IppiInterpolationType interpolation, IppiWarpDirection direction, IppiBorderType borderType, int* pSpecSize, int* pInitBufSize);

Include Files

ippi.h

Domain Dependencies

Headers: ippcore.h, ippvm.h, ipps.h

Libraries: ippcore.lib, ippvm.lib, ipps.lib

Parameters

srcSize

Size of the source image, in pixels.

srcRoi

Source image ROI (of the IppiRect type).

dstSize

Size of the destination image, in pixels.

dataType

Data type of the source and destination images. Supported values: ipp8u, ipp16u, ipp16s, and ipp32f.

coeffs

Coefficients for the perspective transform.

interpolation

Interpolation method. Supported values: ippNearest, ippLinear, andippCubic.

direction

Transformation direction. Supported values:

ippWarpForward

Forward transformation

ippWarpBackward

Backward transformation

borderType

Type of border. Supported values:

ippBorderConst

Values of all border pixels are set to a constant.

ippBorderRepl

Border is replicated from the edge pixels.

ippBorderTransp

Outer pixels are not processed.

ippBorderInMem

Border is obtained from the source image pixels in memory.

Mixed borders are also supported. They can be obtained by the bitwise operation OR between ippBorderTransp and the ippBorderInMemTop, ippBorderInMemBottom, ippBorderInMemLeft, ippBorderInMemRight values.

pSpecSize

Pointer to the size, in bytes, of the specification structure.

pInitBufSize

Pointer to the size, in bytes, of the temporary buffer.

Description

This function computes the size of the specification structure and the external work buffer for the following functions, depending on the interpolation parameter: ippiWarpPerspectiveNearestInit, ippiWarpPerspectiveLinearInit, or ippiWarpPerspectiveCubicInit.

You can set the value of the srcRoi parameter to ippRectInfinite, which means that the ROI is not specified.

Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error when one of the specified pointers is NULL.

ippStsSizeErr

Indicates an error in the following cases:
  • If the width or height of the source or destination image is less than, or equal to one.

  • If one of the calculated sizes exceeds the maximum positive 32-bit signed integer value. The size of the one of the processed images is too large.

ippStsRectErr

Indicates an error in the following cases, if the source image ROI is not ippRectInfinite:
  • If the source image ROI has no intersection with the image.

  • Either x or y component of the source image ROI is negative.

  • Width or height of the source image ROI is less than, or equal to zero.

ippStsDataTypeErr

Indicates an error when dataType has an illegal value.

ippStsWarpDirectionErr

Indicates an error when direction has an illegal value.

ippStsInterpolationErr

Indicates an error when interpolation has an illegal value.

ippStsCoeffErr

Indicates an error when perspective transformation is singular.

ippStsWrongIntersectQuad

Indicates a warning that no operation is performed if the transformed source image extended with borders has no intersection with the destination image.

ippStsBorderErr

Indicates an error when borderType has an illegal value.

ippStsSizeWrn

Indicates a warning when srcRoi exceeds the source image.

See Also