Intel® Integrated Performance Primitives (Intel® IPP) Developer Guide and Reference
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GetDistanceTransformMask
Returns an optimal mask for a given type of metrics and given mask size.
Syntax
IppStatus ippiGetDistanceTransformMask_<mod>(int kerSize, IppiNorm norm, Ipp<datatype>* pMetrics);
Supported values for mod:
| 32s | 32f | 
IppStatus ippiGetDistanceTransformMask(int maskType, Ipp32f* pMetrics);
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
- kerSize
- Specifies the mask size as follows: 3 for 3x3 mask, 5 for 5x5 mask.
- norm
- 
      Specifies the type of metrics. Possible values are: 
     ippiNormInf(0) L∞, Δ = max(|x1 - x2|, |y1 - y2|), ippiNormL1(1) L1, Δ = |x1 - x2| + |y1 - y2|, ippiNormL2(2) L2, Δ = sqrt((x1 - x2)2 + (y1 - y2)2) 
- maskType
-  
     Distance type. 
- pMetrics
- 
      Pointer to the output array to store metrics parameters. The array contains the following number of elements: 
     2 for 3x3 mask, 3 for 5x5 mask. 
Description
This function fills up the output array with metrics parameters for the given type of metrics and size of mask. The function returns the following results:
| (1, 1) | L∞, 3x3 mask, | 
| (1, 2) | L1, 3x3 mask, | 
| (2, 3) | L2, 3x3 mask, 32s data type, | 
| (0.955, 1.3693) | L2, 3x3 mask, 32f data type, | 
| (1, 1, 2) | L∞, 5x5 mask, | 
| (1, 2, 3) | L1, 5x5 mask, | 
| (4, 6, 9) | L2, 5x5 mask, 32s data type, | 
| (1.0, 1.4, 2.1969) | L2, 5x5 mask, 32f data type. | 
For more information, see [Bor86].
For compatibility with the previous versions of the library the earlier function ippiGetDistanceTransformMask replaced by the function ippiGetDistanceTransformMask_32f in the current version is also supported.
Return Values
| ippStsNoErr | Indicates no error. Any other value indicates an error or a warning. | 
| ippStsNullPtrErr | Indicates an error condition if pMetrics pointer is NULL. | 
| ippStsSizeErr | Indicates an error condition if kerSize has a wrong value. | 
| ippStsBadArgErr | Indicates an error condition if kerSize or norm has a wrong value. |