Threshold_Val
Performs thresholding of pixel values in an image buffer.
Pixels that satisfy the compare condition are set to a specified value.
Syntax
Case 1: Not-in-place operation on one-channel
data
IppStatus
ippiThreshold_Val_<mod>
(
const Ipp<datatype>*
pSrc
,
int
srcStep
,
Ipp<datatype>*
pDst
,
int
dstStep
,
IppiSize
roiSize
,
Ipp<datatype>
threshold
,
Ipp<datatype>
value
,
IppCmpOp
ippCmpOp
);
Supported values for
mod
:8u_C1R | 16u_C1R | 16s_C1R | 32f_C1R |
Case 2: Not-in-place operation on multi-channel
data
IppStatus
ippiThreshold_Val_<mod>
(
const Ipp<datatype>*
pSrc
,
int
srcStep
,
Ipp<datatype>*
pDst
,
int
dstStep
,
IppiSize
roiSize
,
const Ipp<datatype>
threshold
[3]
,
const Ipp<datatype>
value
[3]
,
IppCmpOp
ippCmpOp
);
Supported values for
mod
:8u_C3R | 16u_C3R | 16s_C3R | 32f_C3R |
8u_AC4R | 16u_AC4R | 16s_AC4R | 32f_AC4R |
Case 3: In-place operation on one-channel data
IppStatus
ippiThreshold_Val_<mod>
(
Ipp<datatype>*
pSrcDst
,
int
srcDstStep
,
IppiSize
roiSize
,
Ipp<datatype>
threshold
,
Ipp<datatype>
value
,
IppCmpOp
ippCmpOp
);
Supported values for
mod
:8u_C1IR | 16u_C1IR | 16s_C1IR | 32f_C1IR |
Case 4: In-place operation on multi-channel
data
IppStatus
ippiThreshold_Val_<mod>
(
Ipp<datatype>*
pSrcDst
,
int
srcDstStep
,
IppiSize
roiSize
,
const Ipp<datatype>
threshold
[3]
,
const Ipp<datatype>
value
[3]
,
IppCmpOp
ippCmpOp
);
Supported values for
mod
:8u_C3IR | 16u_C3IR | 16s_C3IR | 32f_C3IR |
8u_AC4IR | 16u_AC4IR | 16s_AC4IR | 32f_AC4IR |
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 3 threshold values (one for each color 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 3 output values (one for each color channel) is used.
- ippCmpOp
- The operation to use for comparing pixel values and thethreshold. Comparison for either “less than” or “greater than” can be 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 using the
ippCmpOp
comparison
operation. 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 isNULL.
- ippStsSizeErr
- Indicates an error condition ifroiSizehas a field with zero or negative value.
- ippStsStepErr
- Indicates an error condition ifsrcStep,dstStep, orsrcDstStephas a zero or negative value.