Visible to Intel only — GUID: GUID-A19D2BEF-A5EA-41A4-8926-B7056A12A175
Visible to Intel only — GUID: GUID-A19D2BEF-A5EA-41A4-8926-B7056A12A175
ResizeLanczosInit
Initializes the specification structure for image resizing with the Lanczos interpolation method.
Syntax
IppStatus ippiResizeLanczosInit_<mod>(IppiSize srcSize, IppiSize dstSize, Ipp32u numLobes, IppiResizeSpec_32f* pSpec, Ipp8u* pInitBuf);
Supported values for mod:
8u |
16u |
16s |
32f |
Platform-aware functions
IppStatus ippiResizeLanczosInit_L(IppiSizeL srcSize, IppiSizeL dstSize, IppDataType dataType, Ipp32u numLobes, IppiResizeSpec* pSpec, Ipp8u* pInitBuf);
IppStatus ippiResizeLanczosInit_8u_L(IppiSizeL srcSize, IppiSizeL dstSize, Ipp32u numLobes, IppHintAlgorithm hint, IppiResizeSpec* pSpec, Ipp8u* pInitBuf);
Threading layer (TL) functions
IppStatus ippiResizeLanczosInit_LT(IppiSizeL srcSize, IppiSizeL dstSize, IppDataType dataType, Ipp32u numChannels, Ipp32u numLobes, IppiResizeSpec_LT* pSpec, Ipp8u* pInitBuf);
Include Files
ippi.h
Flavors with the _LT suffix: ippi_tl.h
Flavors with the _L suffix: ippi_l.h
Domain Dependencies
Flavors declared in ippi.h:
Headers: ippcore.h, ippvm.h, ipps.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib
Flavors declared in ippi_tl.h:
Libraries: ippcore.lib, ippvm.lib, ipps.lib, ippi.lib, ippcore_tl.lib, ippi_tl.lib
Parameters
srcSize |
Size, in pixels, of the source image. | ||||||
dstSize |
Size, in pixels, of the destination image. | ||||||
dataType |
Data type of the image. Supported values: ipp8u, ipp16u, ipp16s, ipp32f, ipp64f. | ||||||
hint |
Computation algorithm for processing Ipp8u data. Possible values are:
|
||||||
numChannels |
Number of image channels. Possible values are 1, 3, or 4. | ||||||
numLobes |
Parameter for Lanczos filters. Possible values are 2 or 3. | ||||||
pSpec |
Pointer to the specification structure for the resize filter. | ||||||
pInitBuf |
Pointer to the temporary buffer for the cubic filter initialization. |
Description
This function initializes the specification structure for the resize algorithm with the Lanczos filter interpolation method. This method is based on the 2-lobed or 3-lobed Lanczos window function as an interpolation function, depending on the value of the numLobes parameter.
Before using this function, you need to calculate the size of the specification structure and the external buffer pInitBuf using the ippiResizeGetSize function for the corresponding flavor.
The function with the parameter hint allows users to choose between a faster but less accurate algorithm and a slower but more accurate one. Without the parameter hint this function initializes the specification structure for the faster but less accurate algorithm for Ipp8u data type.
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when one of the specified pointers is NULL. |
ippStsResizeNoOperation |
Indicates an error when width or height of the image is equal to zero. |
ippStsNotSupportedModeErr |
Indicates an error when the requested mode is not supported. |
ippStsDataTypeErr |
Indicates an error if dataType has an illegal value. |
ippStsExceededSizeErr |
Indicates an error If width or height of the source or destination image exceeds 33554431 (0x1FFFFFF) (only for platform-aware and TL functions). |
ippStsSizeErr |
Indicates an error in the following cases:
|