Min

Computes the minimum of image pixel values.

Syntax

Case 1: Operation on one-channel data

IppStatus ippiMin_<mod>(const Ipp<datatype>* pSrc, int srcStep, IppiSize roiSize, Ipp<datatype>* pMin);

Supported values for mod:

8u_C1R

16u_C1R

16s_C1R

32f_C1R

Case 2: Operation on multi-channel data

IppStatus ippiMin_<mod>(const Ipp<datatype>* pSrc, int srcStep, IppiSize roiSize, Ipp<datatype> min[3]);

Supported values for mod:

8u_C3R	16u_C3R	16s_C3R	32f_C3R
8u_AC4R	16u_AC4R	16s_AC4R	32f_AC4R

IppStatus ippiMin_<mod>(const Ipp<datatype>* pSrc, int srcStep, IppiSize roiSize, Ipp<datatype> min[4]);

Supported values for mod:

8u_C4R

16u_C4R

16s_C4R

32f_C4R

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.
pMin	Pointer to the minimum pixel value (for one-channel data).
min	Array containing minimum channel values of pixels in the source buffer (for multi-channel data).

Description

The function ippiMin is declared in the ippi.h file. It operates with ROI (see Regions of Interest in Intel IPP). This function computes the minimum pixel value pMin for the source image pSrc. In case of a multi-channel image, the minimum is computed over each channel and stored in the array min.

The code Example “Using the function ippiMin” demonstrates how to use the function ippiMin.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error condition if pSrc or pMin pointer is `NULL`.
ippStsSizeErr	Indicates an error condition if roiSize has a field with zero or negative value.

Using the function ippiMin

Ipp8u src[4*1] = { 40, 20, 60, 80 };

IppiSize roiSize = { 4, 1 };

Ipp8u min;

ippiMin_8u_C1R ( src, 4, roiSize, &min );

result: min = 20