Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

Threshold_LTVal

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

Syntax

Case 1: Not-in-place operation on one-channel data
IppStatus ippiThreshold_LTVal_<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_LTVal_<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_LTVal_<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_LTVal_<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_LTVal_<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_LTVal_<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 “less 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.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804