Developer Reference

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

GetPyramidDownROI

Computes the size of the lower pyramid layer.

Syntax

IppStatus ippiGetPyramidDownROI(IppiSize
srcRoiSize
, IppiSize*
pDstRoiSize
, Ipp32f
rate
);
Include Files
ippcv.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
,
ipps.h
,
ippi.h
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.lib
,
ippi.lib
Parameters
srcRoiSize
Size of the source pyramid layer ROI in pixels.
pDstRoiSize
Pointer to the size of the destination (lower) pyramid layer ROI in pixels.
rate
Ratio between source and destination layers (1 <
rate
10).
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function computes the size of the lower pyramid layer
pDstRoiSize
for a source layer of a given size
srcRoiSize
and specified size ratio
rate
between them in accordance with the following formulas:
Since for the non-integer
rate
results depend on the computational precision, it is strongly recommended to use this function in computations.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error if
pDstRoiSize
pointer is
NULL
.
ippStsSizeErr
Indicates an error condition if
srcRoiSize
has a field with zero or negative value.
ippStsBadArgErr
Indicates an error condition if
rate
is out of the range.

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