Visible to Intel only — GUID: GUID-A5EBF249-B734-49B7-9A57-CEC75E9AB0EB
Visible to Intel only — GUID: GUID-A5EBF249-B734-49B7-9A57-CEC75E9AB0EB
NormDiff_Inf
Computes the infinity norm of differences between pixel values of two images.
Syntax
Case 1: Operation on one-channel data
IppStatus ippiNormDiff_Inf_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, int src2Step, IppiSize roiSize, Ipp64f* pValue);
Supported values for mod:
8u_C1R |
16u_C1R |
16s_C1R |
32f_C1R |
Case 2: Masked operation on one-channel data
IppStatus ippiNormDiff_Inf_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, int src2Step, const Ipp8u* pMask, int maskStep, IppiSize roiSize, Ipp64f* pNorm);
Supported values for mod:
8u_C1MR |
16u_C1MR |
32f_C1MR |
Case 3: Operation on multi-channel data
IppStatus ippiNormDiff_Inf_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, int src2Step, IppiSize roiSize, Ipp64f value[3]);
Supported values for mod:
8u_C3R |
16u_C3R |
16s_C3R |
32f_C3R |
IppStatus ippiNormDiff_Inf_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, int src2Step, IppiSize roiSize, Ipp64f value[4]);
Supported values for mod:
8u_C4R |
16u_C4R |
16s_C4R |
32f_C4R |
Case 4: Masked operation on multi-channel data
IppStatus ippiNormDiff_Inf_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, int src2Step, const Ipp8u* pMask, int maskStep, IppiSize roiSize, int coi, Ipp64f* pNorm);
Supported values for mod:
8u_C3CMR |
16u_C3CMR |
32f_C3CMR |
Include Files
ippcv.h
ippi.h
Domain Dependencies
Flavors declared in ippcv.h:
Headers: ippcore.h, ippvm.h, ipps.h, ippi.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib, ippi.lib
Flavors declared in ippi.h:
Headers: ippcore.h, ippvm.h, ipps.h
Libraries: ippcore.lib, ippvm.lib, ipps.lib
Parameters
pSrc1, pSrc2 |
Pointers to the source images ROI. |
src1Step, src2Step |
Distance in bytes between starts of consecutive lines in the source images. |
pMask |
Pointer to the mask image. |
maskStep |
Distance in bytes between starts of consecutive lines in the mask image. |
roiSize |
Size of the source ROI in pixels. |
pValue |
Pointer to the computed infinity norm of difference between pixel values. |
value |
An array containing the computed infinity norms of difference between corresponding channel values in case of multi-channel data. |
coi |
Channel of interest (for color images only); can be 1, 2, or 3. |
pNorm |
Pointer to the computed norm value in the mask mode. |
Description
The flavors of the function ippiNormDiff_Inf that perform masked operation are declared in the ippcv.h file. All other function flavors are declared in the ippi.h file. The function operates with ROI (see Regions of Interest in Intel IPP). It computes the infinity norm pValue (pNorm in the mask mode) of differences between pixel values of the two source images pSrc1 and pSrc2. This norm is defined as the largest absolute value of differences:
norm = max |pSrc1-pSrc2|
In the mask mode, the computation is done over pixels selected by nonzero mask values.
For non-masked operations on multi-channel images (Case 3), the norm is computed separately for each pair of corresponding channels and stored in the array value .
In the mask multi-channel mode (Case 4), the norm is computed for a single channel of interest specified by coi.
Return Values
ippStsNoErr |
Indicates no error. Any other value indicates an error or a warning. |
ippStsNullPtrErr |
Indicates an error when any 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 condition in mask mode, if src1Step, src2Step, or maskStep is less than roiSize.width * <pixelSize>. |
ippStsNotEvenStepErr |
Indicates an error condition in mask mode if steps for floating-point images cannot be divided by 4. |
ippStsCOIErr |
Indicates an error when coi is not 1, 2, or 3. |