How to set a 'rec' structuring element in ippiMorphCloseBorder_8u_C1R

[Alexander_G_3]

Hello,

I am using IPP 9.0 Intel 64 to try to reducing processing time in a morphology closing operation on a 2048x2048 image.  I have used perfsys and am seeing a significant reduction in the processing time when Parm5 is 'rec'.  I'm assuming that this is a rectangular structure element, which is what I'm using. 

function

Parm1

Parm2

Parm3

Parm4

Parm5

Parm6

Parm7

Parm8

Comment

Clocks

per

Time (usec)

ippiMorphCloseBorder

8u

C1R

2048x2048

9x9

gen

repl

-

-

nLps=4

26.3

pxch

3.94E+04

ippiMorphCloseBorder

8u

C1R

2048x2048

9x9

ell

repl

-

-

nLps=4

26.4

pxch

3.96E+04

ippiMorphCloseBorder

8u

C1R

2048x2048

9x9

crs

repl

-

-

nLps=4

26.2

pxch

3.92E+04

ippiMorphCloseBorder

8u

C1R

2048x2048

9x9

rec

repl

-

-

nLps=4

2.2

pxch

3.29E+03

Here is the C++ code that I'm using in my test program.  It is taking 0.039 seconds which indicates a non 'rec' Parm5.  I'm using Visual Studio 2013 compiling x64 and testing on Window7 64 bit.  My test HW is Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz, 2801 Mhz, 2 Core(s), 4 Logical Processor(s):

        IppiMorphAdvState* pSpec = NULL;
        Ipp8u* pBuffer = NULL;
        IppiSize roiSize = { src.cols, src.rows };
        int specSize = 0, bufferSize = 0;
        IppiBorderType borderType = ippBorderRepl;
        Ipp16u borderValue = 0;
        Ipp8u pMask[9 * 9] = { 0 };
        IppiSize maskSize = { 9, 9 };
        ippiSet_8u_C1R(1, pMask, 9, maskSize);

        IppStatus status = ippiMorphAdvGetSize_8u_C1R(roiSize, maskSize, &specSize, &bufferSize);
        if (status != ippStsNoErr) return status;

        pSpec = (IppiMorphAdvState*)ippsMalloc_8u(specSize);
        pBuffer = (Ipp8u*)ippsMalloc_8u(bufferSize);

        status = ippiMorphAdvInit_8u_C1R(roiSize, pMask, maskSize, pSpec, pBuffer);
        if (status != ippStsNoErr) {
            ippsFree(pBuffer);
            ippsFree(pSpec);
            return status;
        }

        t = (double)getTickCount();

        status = ippiMorphCloseBorder_8u_C1R(detected_edges.data, detected_edges.step,
            joined.data, joined.step, roiSize, borderType, borderValue, pSpec, pBuffer);

        t = ((double)getTickCount() - t) / getTickFrequency();

        ippsFree(pBuffer);
        ippsFree(pSpec);

The source and destination images are OpenCV Mat types which were created with pointer/step that was allocated with ippiMalloc_8u_C1.

How can I modify my code to give similar times to the perfsys for 'rec' type?  

Thank you,
Alex