Developer Reference

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

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 is
NULL
.
ippStsSizeErr
Indicates an error condition if
roiSize
has 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 the
roundMode
has an illegal 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