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 ifpDstRoiSizepointer isNULL.
- ippStsSizeErr
- Indicates an error condition ifsrcRoiSizehas a field with zero or negative value.
- ippStsBadArgErr
- Indicates an error condition ifrateis out of the range.