Intel® Software Network

Hello, I'm trying to get an image sharpening function with parameters working (apart from the fixed FilterSharpen call). I can't figure out why the code is bombing at the ippiConvFull_32f call below.

1. Could some kind soul please look over the routine below and see if anything is amiss?
2. Does the function look like it is properly constructed to perform sharpening? The end goal is to have a sharpen function with variable strength...


BOOL IppImageConvolutionSharpen_24bit(BYTE *pImageP, UINT32 uWidth, UINT32 uHeight, UINT32 uComponentsPerPixel, UINT32 uInRowStride,
BYTE *pOut, UINT32 uOutRowStride,
double radiusBlur /* 1.0*/
)
{
IppImage32f scratch, input32f;
IppStatus retval;
IppImage32f krnl;
int border=6;
IppiSize dims;
Ipp32f eval[3];

int i, j;
char strDebug[80];
double f1, f2, f3;

dims.height = uHeight;
dims.width = uWidth;

// create temporary 32f version of input data
input32f = MakeIppImage_32f_C3(uWidth, uHeight);
ippiConvert_8u32f_C3R(pImageP, uInRowStride, input32f.pixels, input32f.StepBytes, dims);
// Make sharpen matrix
// This code doesn't work for unsigned data.
krnl = MakeIppImage_32f_C3(3,3);
eval[0] = eval[1] = eval[2] = (-1.0/8.0);
ippiSet_32f_C3R((const Ipp32f *)eval, krnl.pixels, krnl.StepBytes, krnl.dims);
_ippiSetR_32f(krnl, 1, 1, 2.0);
_ippiSetG_32f(krnl, 1, 1, 2.0);
_ippiSetB_32f(krnl, 1, 1, 2.0);

// Add border to image
scratch=MakeIppImage_32f_C3(dims.width + 2 * border, dims.height + 2 * border);
retval=ippiCopyReplicateBorder_32f_C3R((const Ipp32f *)input32f.pixels, input32f.StepBytes, dims,
(Ipp32f *)scratch.pixels, scratch.StepBytes, scratch.dims,
border, border);
if(retval!=ippStsNoErr)
{ MessageBox(GetFocus(), "IppImageConvolutionSharpen_24bit: ippiCopyReplicateBorder_32f_C3R failed", "IppImageConvolutionSharpen_24bit", MB_OK);
return 0;
}

// apply filter
retval = ippiConvFull_32f_C3R(
&scratch.pixels[scratch.StepBytes/sizeof(Ipp32f) * border + border * 3], scratch.StepBytes, dims,//scratch.dims,
krnl.pixels, krnl.StepBytes, krnl.dims,
input32f.pixels, input32f.StepBytes);
if(retval!=ippStsNoErr)
{ MessageBox(GetFocus(), "IppImageConvolutionSharpen_24bit: ippiConvFull_32f_C3R failed", "IppImageConvolutionSharpen_24bit", MB_OK);
return 0;
}

// convert results from 32f back to 8u
ippiConvert_32f8u_C3R(input32f.pixels, input32f.StepBytes, pOut, uOutRowStride, dims, ippRndNear);


// cleanup
DeleteIppImage_32f_C3(scratch);
DeleteIppImage_32f_C3(krnl);
DeleteIppImage_32f_C3(input32f);
return TRUE;
}

Thanks!