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

ID 790148
Date 3/22/2024
Public

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Document Table of Contents

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

Case 5: Threading layer functions based on classic API

IppStatus ippiSqrt_16s_C1IRSfs_T(Ipp16s* pSrcDst, int srcDstStep, IppiSize roiSize, int scaleFactor);

IppStatus ippiSqrt_16s32s_C1RSfs_T(const Ipp16s* pSrc, int srcStep, Ipp32s* pDst, int dstStep, IppiSize roiSize, int scaleFactor);

Include Files

ippi.h

Domain Dependencies

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

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

Parameters

pSrc

Pointer to the source image ROI.

srcStep

Distance, in bytes, between the starting points of consecutive lines in the source image.

pDst

Pointer to the destination image ROI.

dstStep

Distance, in bytes, between the starting points 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 the starting points 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

This function 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 channels.

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.