Abs

Computes absolute pixel values of a source image and places them into the destination image.

Syntax

Case 1: Not-in-place operation

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

Supported values for mod:

16s_C1R	32f_C1R
16s_C3R	32f_C3R
16s_C4R	32f_C4R
16s_AC4R	32f_AC4R

Case 2: In-place operation

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

Supported values for mod:

16s_C1IR	32f_C1IR
16s_C3IR	32f_C3IR
16s_C4IR	32f_C4IR
16s_AC4IR	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.

Description

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

This function takes the absolute value of each channel in each pixel of the source image ROI and places the result into a destination image ROI. It operates on signed data only. 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.