Visible to Intel only — GUID: GUID-B88E5716-FBDD-4CEB-8BE0-8762F13F9636
Visible to Intel only — GUID: GUID-B88E5716-FBDD-4CEB-8BE0-8762F13F9636
WarpPerspectiveLinearInit
Initializes the specification structure for image perspective warping with the linear interpolation method.
Syntax
IppStatus ippiWarpPerspectiveLinearInit(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 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. | ||||||||
direction |
Transformation direction. Supported values:
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numChannels |
Number of channels in the image. Supported values: 1, 3, or 4. | ||||||||
borderType |
Type of border. Supported values:
Mixed borders are also supported. They can be obtained by the bitwise operation OR between ippBorderTransp and the ippBorderInMemTop, ippBorderInMemBottom, ippBorderInMemLeft, ippBorderInMemRight values. |
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pBorderValue |
Pointer to the constant value to assign to pixels of the constant border. This parameter is applicable only to the ippBorderConst border type. |
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smoothEdge |
Flag for edge smoothing. Supported values:
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pSpec |
Pointer to the specification structure. |
Description
This function initializes the IppiWarpSpec structure for the ippiWarpPerspectiveLinear function that performs warp perspective transformation with the linear 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:
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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 not ippRectInfinite:
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ippStsDataTypeErr |
Indicates an error when dataType has an illegal value. |
ippStsWarpDirectionErr |
Indicates an error when direction 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. |
ippStsNotSupportedModeErr |
Indicates an error when the requested mode is not supported. The edge smoothing feature is not supported for the ippBorderRepl and ippBorderConst border types. |
ippStsBorderErr |
Indicates an error when borderType has an illegal value. |
ippStsNumChannelsErr |
Indicates an error when numChannels has an illegal value. |
ippStsSizeWrn |
Indicates a warning when srcRoi exceeds the source image. |