topic Re: IppiConnectedComp in Intel® Integrated Performance Primitives

IppiConnectedComp

mark_wear — Thu, 31 Aug 2006 22:28:30 GMT

How do I use this parameter of the FloodFill function? I can't find an adequate description or example of how this works.

Thanks,

Mark

Re: IppiConnectedComp

Vladimir_Dudnik — Fri, 15 Sep 2006 02:51:25 GMT

Hello,

might be this simple sample can help?

Ipp8u pImage[8*8] = { 0, 1, 2, 3, 4, 5, 6, 7,
 0, 1, 2, 3, 4, 5, 6, 7,
 0, 1, 2, 3, 4, 5, 6, 7,
 0, 1, 2, 3, 4, 5, 6, 7,
 0, 1, 2, 3, 4, 5, 6, 7,
 0, 1, 2, 3, 4, 5, 6, 7,
 0, 1, 2, 3, 4, 5, 6, 7,
 0, 1, 2, 3, 4, 5, 6, 7};
IppiSize roiSize = { 4, 4 };
IppiPoint seed = { 2, 2 };
Ipp8u newVal = 9;
Ipp8u minDelta = 1;
Ipp8u maxDelta = 1;
int pBufSize;
IppiConnectedComp pRegion;
ippiFloodFillGetSize_Grad ( roiSize, &pBufSize );
Ipp8u* pBuffer = ippiMalloc_8u_C1 ( 8, 8, &pBufSize );
 
ippiFloodFill_Grad4Con_8u_C1IR ( pImage, 8, roiSize, seed, newVal, minDelta, maxDelta, &pRegion, pBuffer );
result:
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7<
o:p>
0 1 2 3 4 5 6 7 pImage (source)
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
9 9 9 9 4 5 6 7
9 9 9 9 4 5 6 7
9 9 9 9 4 5 6 7
9 9 9 9 4 5 6 7
0 1 2 3 4 5 6 7 pImage (destination)
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
pRegion.area = 16
pRegion.value = 9.0
pRegion.rect.x = 0.0 pRegion (after FloodFill_Grad)
pRegion.rect.y = 0.0 
pRegion.rect.width = 4.0
pRegion.rect.height = 4.0

Regards,
Vladimir

Re: IppiConnectedComp

Intel_C_Intel — Tue, 19 Sep 2006 16:56:03 GMT

Hi, Mark,

FloodFill function fills the group of pixels ajacent to the seed with the same value.

FloodFill_Range function fills the group of pixels ajacent to the seed belonging to an inverval (equivalent to FloodFill with interval [seed,seed]).

FloodFill_Grad function fills the group of pixels ajacent to the seed with theabsolute gradient no more than the argument value.

in the example max abs gradient for all pixels from ROI is 1, so the whole ROI is flooded.

The description (mb rather formal) is in IPP manual Volume2

regards,

Alexander

Re: IppiConnectedComp

Intel_C_Intel — Tue, 19 Sep 2006 16:56:40 GMT

Hi, Mark,

FloodFill function fills the group of pixels ajacent to the seed with the same value.

FloodFill_Range function fills the group of pixels ajacent to the seed belonging to an inverval (equivalent to FloodFill with interval [seed,seed]).

FloodFill_Grad function fills the group of pixels ajacent to the seed with theabsolute gradient no more than the argument value.

in the example max abs gradient for all pixels from ROI is 1, so the whole ROI is flooded.

The description (mb rather formal) is in IPP manual Volume2

regards,

Alexander

Re: IppiConnectedComp

Intel_C_Intel — Tue, 19 Sep 2006 16:57:35 GMT

Hi, Mark,

FloodFill function fills the group of pixels ajacent to the seed with the same value.

FloodFill_Range function fills the group of pixels ajacent to the seed belonging to an inverval (equivalent to FloodFill with interval [seed,seed]).

FloodFill_Grad function fills the group of pixels ajacent to the seed with theabsolute gradient no more than the argument value.

in the example max abs gradient for all pixels from ROI is 1, so the whole ROI is flooded.

The description (mb rather formal) is in IPP manual Volume2

regards,

Alexander