Intel® Integrated Performance Primitives (Intel® IPP) Developer Guide and Reference
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AbsDiff
Calculates absolute difference between two images.
Syntax
IppStatus ippiAbsDiff_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, int src2Step, Ipp<datatype>* pDst, int dstStep, IppiSize roiSize);
Supported values for mod:
| 8u_C1R | 16u_C1R | 32f_C1R | 
| 8u_C3R | 
 | 
 | 
Include Files
ippcv.h
Domain Dependencies
Headers: ippcore.h, ippvm.h, ipps.h, ippi.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib, ippi.lib
Parameters
| pSrc1 | Pointer to the first source image. | 
| src1Step | Distance in bytes between starts of consecutive lines in the first source image. | 
| pSrc2 | Pointer to second source image. | 
| src2Step | Distance in bytes between starts of consecutive lines in the second source image. | 
| pDst | Pointer to the destination image. | 
| dstStep | Distance in bytes between starts of consecutive lines in the destination image. | 
| roiSize | Size of the image ROI in pixels. | 
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function calculates the absolute pixel-wise difference between two images by the formula:
pDst(x,y) = abs(pSrc1(x,y) - pSrc2(x,y)).
Return Values
| ippStsNoErr | Indicates no error. | 
| 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. | 
| ippStsStepErr | Indicates an error when src1Step, src2Step or dstStep is less than roiSize.width * <pixelSize>. | 
| ippStsNotEvenStepErr | Indicates an error condition if one of step values for floating-point images cannot be divided by 4. |