Exp
Computes the exponential of pixel values in a source image
and writes the results into the destination image.
Syntax
Case 1: Not-in-place operation on integer data
IppStatus ippiExp_<mod>
(
const Ipp<datatype>*
pSrc
,
int
srcStep
,
Ipp<datatype>*
pDst
,
int
dstStep
,
IppiSize
roiSize
,
int
scaleFactor
);
Supported values for
mod
:8u_C1RSfs | 16u_C1RSfs | 16s_C1RSfs |
8u_C3RSfs | 16u_C3RSfs | 16s_C3RSfs |
Case 2: Not-in-place operation on floating-point
data
IppStatus ippiExp_<mod>
(
const Ipp32f*
pSrc
,
int
srcStep
,
Ipp32f*
pDst
,
int
dstStep
,
IppiSize
roiSize
);
Supported values for
mod
:32f_C1R |
32f_C3R |
Case 3: In-place operation on integer data
IppStatus ippiExp_<mod>
(
Ipp<datatype>*
pSrcDst
,
int
srcDstStep
,
IppiSize
roiSize
,
int
scaleFactor
);
Supported values for
mod
:8u_C1IRSfs | 16u_C1IRSfs | 16s_C1IRSfs |
8u_C3IRSfs | 16u_C3IRSfs | 16s_C3IRSfs |
Case 4: In-place operation on floating-point
data
IppStatus ippiExp_<mod>
(
Ipp32f*
pSrcDst
,
int
srcDstStep
,
IppiSize
roiSize
);
Supported values for
mod
:32f_C1IR |
32f_C3IR |
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 for the in-place operation.
- roiSize
- Size of the source and destination ROI in pixels.
- scaleFactor
- Scale factor (see Integer Result Scaling).
Description
This function operates with ROI (see Regions of Interest in Intel
IPP).
This function computes
e
to the power of pixel values
of the source image ROI and writes the resultant values into the destination image
ROI. The function flavors operating on integer data apply fixed scaling defined by
scaleFactor
to the
internally computed values, and saturate the results before writing them to the
destination image ROI.When the overflow occurs, the resultant value is determined in
accordance with the data type (see appendix “Handling of
Special Cases” for more information).
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 pointers 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.