Developer Reference

  • 2020
  • 10/21/2020
  • Public Content
Contents

Div

Divides pixel values of an image by pixel values of another image.

Syntax

Case 1: Not-in-place operation on integer or complex data
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc1
,
int
src1Step
,
const Ipp<datatype>*
pSrc2
,
int
src2Step
,
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
8u_AC4RSfs
16u_AC4RSfs
16s_AC4RSfs
8u_C4RSfs
16u_C4RSfs
16s_C4RSfs
Case 2: Not-in-place operation on floating-point or complex data
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc1
,
int
src1Step
,
const Ipp<datatype>*
pSrc2
,
int
src2Step
,
Ipp<datatype>*
pDst
,
int
dstStep
,
IppiSize
roiSize
);
Supported values for
mod
:
32f_C1R
32f_C3R
32f_AC4R
32f_C4R
Case 3: In-place operation on integer or complex data
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc
,
int
srcStep
,
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
8u_AC4IRSfs
16u_AC4IRSfs
16s_AC4IRSfs
8u_C4IRSfs
16u_C4IRSfs
16s_C4IRSfs
Case 4: In-place operation on floating-point or complex data
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc
,
int
srcStep
,
Ipp<datatype>*
pSrcDst
,
int
srcDstStep
,
IppiSize
roiSize
);
Supported values for
mod
:
32f_C1IR
32f_C3IR
32f_AC4IR
32f_C4IR
Case 5: Not-in-place operation on integer data with platform-aware functions
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc1
,
IppSizeL
src1Step
,
const Ipp<datatype>*
pSrc2
,
IppSizeL
src2Step
,
Ipp<datatype>*
pDst
,
IppSizeL
dstStep
,
IppiSizeL
roiSize
,
int
scaleFactor
);
Supported values for
mod
:
8u_C1RSfs_L
16u_C1RSfs_L
16s_C1RSfs_L
8u_C3RSfs_L
16u_C3RSfs_L
16s_C3RSfs_L
8u_AC4RSfs_L
16u_AC4RSfs_L
16s_AC4RSfs_L
8u_C4RSfs_L
16u_C4RSfs_L
16s_C4RSfs_L
Case 6: Not-in-place operation on floating-point data with platform-aware functions
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc1
,
IppSizeL
src1Step
,
const Ipp<datatype>*
pSrc2
,
IppSizeL
src2Step
,
Ipp<datatype>*
pDst
,
IppSizeL
dstStep
,
IppiSizeL
roiSize
);
Supported values for
mod
:
32f_C1R_L
32f_C3R_L
32f_AC4R_L
32f_C4R_L
Case 7: In-place operation on integer data with platform-aware functions
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc
,
IppSizeL
srcStep
,
Ipp<datatype>*
pSrcDst
,
IppSizeL
srcDstStep
,
IppiSizeL
roiSize
,
int
scaleFactor
);
Supported values for
mod
:
8u_C1IRSfs_L
16u_C1IRSfs_L
16s_C1IRSfs_L
8u_C3IRSfs_L
16u_C3IRSfs_L
16s_C3IRSfs_L
8u_AC4IRSfs_L
16u_AC4IRSfs_L
16s_AC4IRSfs_L
8u_C4IRSfs_L
16u_C4IRSfs_L
16s_C4IRSfs_L
Case 8: In-place operation on floating-point data with platform-aware functions
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc
,
IppSizeL
srcStep
,
Ipp<datatype>*
pSrcDst
,
IppSizeL
srcDstStep
,
IppiSizeL
roiSize
);
Supported values for
mod
:
32f_C1IR_L
32f_C3IR_L
32f_AC4IR_L
32f_C4IR_L
Case 9: Not-in-place operation on integer data with threading layer (TL) functions
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc1
,
IppSizeL
src1Step
,
const Ipp<datatype>*
pSrc2
,
IppSizeL
src2Step
,
Ipp<datatype>*
pDst
,
IppSizeL
dstStep
,
IppiSizeL
roiSize
,
int
scaleFactor
);
Supported values for
mod
:
8u_C1RSfs_LT
16u_C1RSfs_LT
16s_C1RSfs_LT
8u_C3RSfs_LT
16u_C3RSfs_LT
16s_C3RSfs_LT
8u_AC4RSfs_LT
16u_AC4RSfs_LT
16s_AC4RSfs_LT
8u_C4RSfs_LT
16u_C4RSfs_LT
16s_C4RSfs_LT
Case 10: Not-in-place operation on floating-point data with TL functions
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc1
,
IppSizeL
src1Step
,
const Ipp<datatype>*
pSrc2
,
IppSizeL
src2Step
,
Ipp<datatype>*
pDst
,
IppSizeL
dstStep
,
IppiSizeL
roiSize
);
Supported values for
mod
:
32f_C1R_LT
32f_C3R_LT
32f_C4R_LT
32f_AC4R_LT
Case 11: In-place operation on integer data with TL functions
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc
,
IppSizeL
srcStep
,
Ipp<datatype>*
pSrcDst
,
IppSizeL
srcDstStep
,
IppiSizeL
roiSize
,
int
scaleFactor
);
Supported values for
mod
:
8u_C1IRSfs_LT
16u_C1IRSfs_LT
16s_C1IRSfs_LT
8u_C3IRSfs_LT
16u_C3IRSfs_LT
16s_C3IRSfs_LT
8u_AC4IRSfs_LT
16u_AC4IRSfs_LT
16s_AC4IRSfs_LT
8u_C4IRSfs_LT
16u_C4IRSfs_LT
16s_C4IRSfs_LT
Case 12: In-place operation on floating-point data with TL functions
IppStatus ippiDiv_<mod>
(
const Ipp<datatype>*
pSrc
,
IppSizeL
srcStep
,
Ipp<datatype>*
pSrcDst
,
IppSizeL
srcDstStep
,
IppiSizeL
roiSize
);
Supported values for
mod
:
32f_C1IR_LT
32f_C3IR_LT
32f_AC4IR_LT
32f_C4IR_LT
Include Files
ippi.h
Flavors with the
_LT
suffix:
ippi_tl.h
Flavors with the
_L
suffix:
ippi_l.h
Domain Dependencies
Flavors declared in
ippi.h
:
Headers:
ippcore.h
,
ippvm.h
,
ipps.h
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.lib
Flavors declared in
ippi_tl.h
:
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.lib
,
ippi.lib
,
ippcore_tl.lib
,
ippi_tl.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.
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
. For complex data, the function processes both real and imaginary parts of pixel values. In case of operations on integer data, the resulting values are scaled by
scaleFactor
and rounded (not truncated). 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 channels.
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.

Example

The code example below illustrates how the function
ippiDiv
can be used.
IppStatus div32f( void ) { Ipp32f a[4*3], b[4*3]; IppiSize roi = {2,2}; int i; for( i=0; i<4*3; ++i ) a[i] = b[i] = (float)i; return ippiDiv_32f_C1IR( a, 4*sizeof(Ipp32f), b, 4*sizeof(Ipp32f), roi ); }
The destination image b contains
-1.#IND +1.000 +2.000 +3.000
+1.000 +1.000 +6.000 +7.000
+8.000 +9.000 +10.00 +11.00
Console output:
-- warning in div32f: (6) Zero value(s) of divisor in the function Div

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.