probl. with understanding matching-functions

Deleted_U_Intel — Mon, 11 Jul 2005 21:31:19 GMT

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

Re: probl. with understanding matching-functions

chobanu_p_m1 — Tue, 14 Nov 2006 21:47:29 GMT

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

topic Re: probl. with understanding matching-functions in Intel® Integrated Performance Primitives

probl. with understanding matching-functions

Re: probl. with understanding matching-functions

Re: probl. with understanding matching-functions