probl. with understanding matching-functions

[Deleted_U_Intel]

Hello,

i'm quite new to the IPP and tried to write a little
program for testing ippiMatchTemplate, but the output of
the program is not what i expected. I think it has
to be 3 by 3 ((W-w+1)*(H-h+1)), but it seems to be only 1 by 3 (look at code).
What is my mistake?

Here's the code:

int i, j;

IppiSize srcROI;
srcROI.width = 5;
srcROI.height = 5;

IppiSize tplROI;
tplROI.width = 3;
tplROI.height = 3;

Ipp8u testpic[] = {
128, 0, 0, 0, 128,
0, 128, 0, 128, 0,
0, 0, 128, 0, 0,
0, 128, 0, 128, 0,
128, 0, 0, 0, 128 };

Ipp8u testtpl[] = {
128, 0, 128,
0, 128, 0,
128, 0, 128};

// i thought the result should be a 3 by 3 image with
// largest value in the mid

int resStep;
int resSize = 5-3+1;
Ipp32f * res = ippiMalloc_32f_C1(resSize,resSize,&resStep);

int bufSize;
int mpicstep, mtplstep;
Ipp8u * mtestpic, *mtesttpl;

mtestpic = ippiMalloc_8u_C1(5,5,&mpicstep);
mtesttpl = ippiMalloc_8u_C1(3,3,&mtplstep);

for(j=0; j5; j++)
for(i=0; i5; i++) mtestpic[i+j*mpicstep] = testpic[i+j*5];

for(j=0; j3; j++)
for(i=0; i3; i++) mtesttpl[i+j*mtplstep] = testtpl[i+j*3];

for(j=0; j3; j++)
for(i=0; i3; i++) res[i+j*resStep] = 3.3f;

ippiMatchTemplateGetBufSize_CorrNormed(
srcROI, tplROI, ipp8u, &bufSize);

Ipp8u* buffer = ippsMalloc_8u(bufSize);

switch(
ippiMatchTemplate_CorrNormed_8u32f_C1R(
mtestpic, mpicstep, srcROI,
mtesttpl, mtplstep, tplROI,
res, resStep, buffer)
)
{
case ippStsNullPtrErr: printf("ippStsNullPtrErr "); break;
case ippStsSizeErr: printf("ippStsSizeErr "); break;
case ippStsStepErr: printf("ippStsStepErr "); break;
case ippStsNotEvenStepErr: printf("ippStsNotEvenStepErr "); break;
case ippStsNoErr: printf("OK ");
}

printf(" Match-Result: ");
for(j=0; j
{
for(i=0; i
{
printf("%1.3g ", res[i+j*resStep]);
}
printf(" ");
}
ippiFree(mtestpic);
ippiFree(mtesttpl);
ippiFree(res);
ippsFree(buffer);



Thanks in advance,

J. Blaser

[Vladimir_Dudnik]

Great, for your convenience, using MathTemplate function discussed here several times, so probably you can find it useful to read related topics:

http://softwareforums.intel.com/ids/board/message?board.id=IPP&message.id=319

http://softwareforums.intel.com/ids/board/message?board.id=IPP&message.id=808

http://softwareforums.intel.com/ids/board/message?board.id=IPP&message.id=1825

http://softwareforums.intel.com/ids/board/message?board.id=IPP&message.id=1985

Regards,

Vladimir

[chobanu_p_m1]

hi!

none of the links works
could you tell me, please, what whould be the correct output in this example in case it woul de corrected (the error with indexes, i mean)
should the output matrix be symmentic?

regards,
Petr