Intel® Integrated Performance Primitives (Intel® IPP) Developer Guide and Reference
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Max
Computes the maximum of image pixel values.
Syntax
Case 1: Operation on one-channel data
IppStatus ippiMax_<mod>(const Ipp<datatype>* pSrc, int srcStep, IppiSize roiSize, Ipp<datatype>* pMax);
Supported values for mod:
| 8u_C1R | 16u_C1R | 16s_C1R | 32f_C1R | 
Case 2: Operation on multi-channel data
IppStatus ippiMax_<mod>(const Ipp<datatype>* pSrc, int srcStep, IppiSize roiSize, Ipp<datatype> max[3]);
Supported values for mod:
| 8u_C3R | 16u_C3R | 16s_C3R | 32f_C3R | 
| 8u_AC4R | 16u_AC4R | 16s_AC4R | 32f_AC4R | 
IppStatus ippiMax_<mod>(const Ipp<datatype>* pSrc, int srcStep, IppiSize roiSize, Ipp<datatype> max[4]);
Supported values for mod:
| 8u_C4R | 16u_C4R | 16s_C4R | 32f_C4R | 
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 starts of consecutive lines in the source image. | 
| roiSize | Size of the source ROI in pixels | 
| pMax | Pointer to the maximum pixel value (for one-channel data). | 
| max | Array containing maximum channel values of pixels in the source buffer (for multi-channel data). | 
Description
This function operates with ROI (see Regions of Interest in Intel IPP). This function computes the maximum pixel value pMax for the source image pSrc. In case of a multi-channel image, the maximum is computed over each channel and stored in the array max.
Return Values
| ippStsNoErr | Indicates no error. Any other value indicates an error or a warning. | 
| ippStsNullPtrErr | Indicates an error condition if pSrc or pMax pointer is NULL. | 
| ippStsSizeErr | Indicates an error condition if roiSize has a field with zero or negative value. |