WarpPerspectiveNearestInit
Initializes the specification structure for image perspective warping with the nearest neighbor interpolation method.
Syntax
IppStatus ippiWarpPerspectiveNearestInit(IppiSize
srcSize
, IppiRect
srcRoi
, IppiSize
dstSize
, IppDataType
dataType
, const double
coeffs[3][3]
, IppiWarpDirection
direction
, int
numChannels
, IppiBorderType
borderType
, const Ipp64f*
pBorderValue
, int
smoothEdge
, IppiWarpSpec*
pSpec
);
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 theIppiRect type).
- dstSize
- Size of the destination image, in pixels.
- dataType
- Data type of the source and destination images. Supported values:ipp8u,ipp16u,ipp16s, andipp32f.
- coeffs
- Coefficients for the perspective transform.
- direction
- Transformation direction. Supported values:
- ippWarpForward
- Forward transformation
- ippWarpBackward
- Backward transformation
- numChannels
- Number of channels in the image. Supported values: 1, 3, or 4.
- 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 operationORbetweenippBorderTranspand theippBorderInMemTop,ippBorderInMemBottom,ippBorderInMemLeft,ippBorderInMemRightvalues. - pBorderValue
- Pointer to the constant value to assign to pixels of the constant border. This parameter is applicable only to theippBorderConstborder type.
- smoothEdge
- Flag for edge smoothing. Supported values:
- 0- transformation without edge smoothing.
- 1- transformation with edge smoothing.This feature is supported only for theippBorderTranspandippBorderInMemborder types.
- pSpec
- Pointer to the specification structure.
Description
This function initializes the
IppiWarpSpec
structure for the WarpPerspectiveNearest function that performs warp perspective transformation with the nearest neighbor interpolation method. To compute the size of the specification structure, use the WarpPerspectiveGetSize function.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:
- pSpecisNULL
- pBorderValueisNULLwhen the border type is set toippBorderConst
- ippStsSizeErr
- Indicates an error when width or height of the source or destination image is less than, or equal to one.
- ippStsRectErr
- Indicates an error in the following cases, if the source image ROI is notippRectInfinite:
- If the source image ROI has no intersection with the image.
- Eitherxorycomponent 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 whendataTypehas an illegal value.
- ippStsWarpDirectionErr
- Indicates an error whendirectionhas 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.
- ippStsNotSupportedModeErr
- Indicates an error when the requested mode is not supported.The edge smoothing feature is not supported for theippBorderReplandippBorderConstborder types.
- ippStsBorderErr
- Indicates an error whenborderTypehas an illegal value.
- ippStsNumChannelsErr
- Indicates an error whennumChannelshas an illegal value.
- ippStsSizeWrn
- Indicates a warning whensrcRoiexceeds the source image.