Div_Round
Divides pixel values of an image by pixel values of another image with different rounding modes.
Syntax
Case 1: Not-in-place operation on integer data
IppStatus ippiDiv_Round_<mod>
(
const Ipp
<datatype>
*
pSrc1
,
int
src1Step
,
const Ipp
<datatype>
*
pSrc2
,
int
src2Step
,
Ipp
<datatype>
*
pDst
,
int
dstStep
,
IppiSize
roiSize
,
IppRoundMode
rndMode
,
int
scaleFactor
);
Supported values for
mod
:
8u_C1RSfs |
16u_C1RSfs |
16s_C1RSfs |
8u_C3RSfs |
16u_C3RSfs |
16s_C3RSfs |
8u_AC4RSfs |
16u_AC4RSfs |
16s_AC4RSfs |
8u_C4RSfs |
16u_C4RSfs |
16s_C4RSfs |
Case 2: In-place operation on integer data
IppStatus ippiDiv_Round_<mod>
(
const Ipp
<datatype>
*
pSrc
,
int
srcStep
,
Ipp
<datatype>
*
pSrcDst
,
int
srcDstStep
,
IppiSize
roiSize
,
IppRoundMode
rndMode
,
int
scaleFactor
);
Supported values for
mod
:
8u_C1IRSfs |
16u_C1IRSfs |
16s_C1IRSfs |
8u_C3IRSfs |
16u_C3IRSfs |
16s_C3IRSfs |
8u_AC4IRSfs |
16u_AC4IRSfs |
16s_AC4IRSfs |
8u_C4IRSfs |
16u_C4IRSfs |
16s_C4IRSfs |
Include Files
ippi.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
,
ipps.h
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.lib
Parameters
- pSrc,pSrc1,pSrc2
- Pointers to the source images ROI.
- srcStep,src1Step,src2Step
- Distances in bytes between starts of consecutive lines in the source images.
- 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.
- roundMode
- Rounding mode, the following values are possible:
- ippRndZero
- specifies that floating-point values are truncated toward zero,
- ippRndNear
- specifies that floating-point values are rounded to the nearest even integer when the fractional part equals 0.5; otherwise they are rounded to the nearest integer,
- ippRndFinancial
- specifies that floating-point values are rounded down to the nearest integer when the fractional part is less than 0.5, or rounded up to the nearest integer if the fractional part is equal or greater than 0.5.
- scaleFactor
- Scale factor (see Integer Result Scaling ).
Description
This function operates with ROI (see
Regions of Interest in Intel IPP
).
This function divides pixel values of the source buffer
pSrc2
by the corresponding pixel values of the buffer
pSrc1
and places the result in a destination buffer
pDst
. For in-place operations, the values in
pSrcDst
are divided by the values in
pSrc
and placed into
pSrcDst
. The resulting values are scaled by
scaleFactor
and rounded using the rounding method specified by the parameter
roundMode
. When the function encounters a zero divisor value, the execution is not interrupted. The function returns the warning message and corresponding result value (see appendix “
Handling of Special Cases
” for more information).
Note that the functions with the
AC4
descriptor do not process alpha channelss.
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 if any of the specified buffer step values is zero or negative.
- ippStsDivByZero
- Indicates a warning that a divisor value is zero. The function execution is continued.
- ippStsStsRoundModeNotSupportedErr
- Indicates an error condition if theroundModehas an illegal value.