Compare

Compares pixel values of two images using a specified compare operation.

Syntax

IppStatus ippiCompare_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, src2Step, Ipp8u* pDst, int dstStep, IppiSize roiSize, IppCmpOp ippCmpOp);

Supported values for mod:

8u_C1R	16u_C1R	16s_C1R	32f_C1R
8u_C3R	16u_C3R	16s_C3R	32f_C3R
8u_C4R	16u_C4R	16s_C4R	32f_C4R
8u_AC4R	16u_AC4R	16s_AC4R	32f_AC4R

Parameters

pSrc1, pSrc2	Pointers to the source image ROIs.
src1Step, src2Step	Distances in bytes between starts of consecutive lines in the source images.
pDst	Pointer to the destination image ROI.
dstStep	Distance in bytes between starts of consecutive lines in the destination image.
roiSize	Size of the source and destination ROI in pixels.
ippCmpOp	Compare operation to be used for comparing the pixel values.

Description

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

This function compares the corresponding pixels of ROI in two source images pSrc1, pSrc2 using the ippCmpOp compare operation, and writes the results to a one-channel Ipp8u image pDst. If the result of the compare is true, the corresponding output pixel is set to an IPP_MAX_8U value; otherwise, it is set to 0.

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 pointer is NULL.
ippStsSizeErr	Indicates an error condition if roiSize has a field with zero or negative value.
ippStsStepErr	Indicates an error condition if src1Step, src2Step, or dstStep has a zero or negative value.