Performs thresholding of pixel values in an image. Pixels that are greater than threshold, are set to a specified value.

Syntax

Case 1: Not-in-place operation on one-channel data

IppStatus ippiThreshold_GTVal_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pDst, int dstStep, IppiSize roiSize, Ipp<datatype> threshold, Ipp<datatype> value);

Supported values for mod:

8u_C1R

16u_C1R

16s_C1R

32f_C1R

Case 2: Not-in-place operation on multi-channel data

IppStatus ippiThreshold_GTVal_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pDst, int dstStep, IppiSize roiSize, const Ipp<datatype> threshold[3], const Ipp<datatype> value[3]);

Supported values for mod:

8u_C3R

16u_C3R

16s_C3R

32f_C3R

8u_AC4R

16u_AC4R

16s_AC4R

32f_AC4R

IppStatus ippiThreshold_GTVal_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pDst, int dstStep, IppiSize roiSize, const Ipp<datatype> threshold[4], const Ipp<datatype> value[4]);

Supported values for mod:

8u_C4R

16u_C4R

16s_C4R

32f_C4R

Case 3: In-place operation on one-channel data

IppStatus ippiThreshold_GTVal_<mod>(Ipp<datatype>* pSrcDst, int srcDstStep, IppiSize roiSize, Ipp<datatype> threshold, Ipp<datatype> value);

Supported values for mod:

8u_C1IR

16u_C1IR

16s_C1IR

32f_C1IR

Case 4: In-place operation on multi-channel data

IppStatus ippiThreshold_GTVal_<mod>(Ipp<datatype>* pSrcDst, int srcDstStep, IppiSize roiSize, const Ipp<datatype> threshold[3], const Ipp<datatype> value[3]);

Supported values for mod:

8u_C3IR

16u_C3IR

16s_C3IR

32f_C3IR

8u_AC4IR

16u_AC4IR

16s_AC4IR

32f_AC4IR

IppStatus ippiThreshold_GTVal_<mod>(Ipp<datatype>* pSrcDst, int srcDstStep, IppiSize roiSize, const Ipp<datatype> threshold[4], const Ipp<datatype> value[4]);

Supported values for mod:

8u_C4IR

16u_C4IR

16s_C4IR

32f_C4IR

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.

pDst

Pointer to the destination image ROI.

dstStep

Distance in bytes between starts of consecutive lines in the destination image.

pSrcDst

Pointer to the source and destination image ROI (for the in-place operation).

srcDstStep

Distance in bytes between starts of consecutive lines in the source and destination image buffer (for the in-place operation).

roiSize

Size of the source and destination ROI in pixels.

threshold

The threshold value to use for each pixel.In case of multi-channel data, an array of threshold values (one for each channel) is used.

value

The output value to be set for each pixel that satisfies the compare condition. In case of multi-channel data, an array of output values (one for each channel) is used.

Description

This function operates with ROI (see Regions of Interest in Intel IPP).

This function thresholds pixels in the source image pSrc using the specified level threshold. Pixel values in the source image are compared to the threshold value for “greater than”.

If the result of the compare is true, the corresponding output pixel is set to the specified value. Otherwise, it is set to the source pixel value.

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 srcStep, dstStep, or srcDstStep has a zero or negative value.
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