Sqrt

Computes square roots of pixel values of a source image and writes them into the destination image.

Syntax

Case 1: Not-in-place operation on integer data

IppStatus ippiSqrt_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pDst, int dstStep, IppiSize roiSize, int scaleFactor);

Supported values for mod:

8u_C1RSfs	16u_C1RSfs	16s_C1RSfs
8u_C3RSfs	16u_C3RSfs	16s_C3RSfs
8u_AC4RSfs	16u_AC4RSfs	16s_AC4RSfs

Case 2: Not-in-place operation on floating-point data

IppStatus ippiSqrt_<mod>(const Ipp32f* pSrc, int srcStep, Ipp32f* pDst, int dstStep, IppiSize roiSize);

Supported values for mod:

32f_C1R

32f_C3R

32f_AC4R

Case 3: In-place operation on integer data

IppStatus ippiSqrt_<mod>(Ipp<datatype>* pSrcDst, int srcDstStep, IppiSize roiSize, int scaleFactor);

Supported values for mod:

8u_C1IRSfs	16u_C1IRSfs	16s_C1IRSfs
8u_C3IRSfs	16u_C3IRSfs	16s_C3IRSfs
8u_AC4IRSfs	16u_AC4IRSfs	16s_AC4IRSfs

Case 4: In-place operation on floating-point data

IppStatus ippiSqrt_<mod>(Ipp32f* pSrcDst, int srcDstStep, IppiSize roiSize);

Supported values for mod:

32f_C1IR

32f_C3IR

32f_C4IR

32f_AC4IR

Parameters

pSrc	Pointer to the source image ROI.
srcStep	Distance in bytes between starts of consecutive lines in the source image.
pDst	Pointer to the destination image ROI.
dstStep	Distance in bytes between starts of consecutive lines in the destination image.
pSrcDst	Pointer to the source and destination image ROI for the in-place operation.
srcDstStep	Distance in bytes between starts of consecutive lines in the source and destination image for the in-place operation.
roiSize	Size of the source and destination ROI in pixels.
scaleFactor	Scale factor (see Integer Result Scaling).

Description

The function ippiSqrt is declared in the ippi.h file. It operates with ROI (see Regions of Interest in Intel IPP).

This function computes square roots of pixel values of the source image ROI and writes them into the destination image ROI. The function flavors operating on integer data apply fixed scaling defined by scaleFactor to the internally computed values, and saturate the results before writing them to the destination image ROI. If a source pixel value is negative, the function issues a warning and continues execution with the corresponding result value (see appendix “Handling of Special Cases” for more information ).

Note that the functions with the AC4 descriptor do not process alpha channelss.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error condition if one of the specified pointers is NULL.
ippStsSizeErr	Indicates an error condition if roiSize has a field with zero or negative value.
ippStsSqrtNegArg	Indicates a warning that a source pixel has a negative value.