<p>Hello, I'm trying to magnify image with linear interpolation and I get strange results with ResizeSqrPixel.
Eg., transformation of 2x2 to 3x3 (just inset one column and one row) works as expected:
source:
0.0 10.0
10.0 0.0
destination:
0.0 5.0 10.0
5.0 5.0 5.0
10.0 5.0 0.0
But I get unexpected result with
Source w=3 h= 3
0: 0.0 10.0 0.0
1: 10.0 0.0 10.0
2: 0.0 10.0 0.0
Destinationw=5 h= 5
0: 0.0 4.0 10.0 4.0 0.0
1: 4.0 4.8 6.0 4.8 4.0
2: 10.0 6.0 0.0 6.0 10.0
3: 4.0 4.8 6.0 4.8 4.0
4: 0.0 4.0 10.0 4.0 0.0
IPP version 6.1, code:
int w1, w2, h1, h2;
w1=3; h1=3;
Ipp32f src[3*3] = {0, 10, 0, 10, 0, 10, 0, 10, 0};
// w1=2; h1=2; // Ipp32f src[2*2] = {0, 10, 10, 0};
w2 = 2*w1-1;
h2 = 2*h1-1;
Ipp32f dst[w2*h2];
double dx=double(w2)/double(w1);
double dy=double(h2)/double(h1);
IppiRect srcRect={0,0,w1,h1};
IppiRect dstRect={0,0,w2,h2};
Ipp8u *buf = NULL;
int bufsize; ippiResizeGetBufSize( srcRect, dstRect, 1, IPPI_INTER_LINEAR, &bufsize );
IppiSize srcSize = {w1,h1};
IppiSize dstSize = {w2,h2};
int srcStep = srcSize.width*sizeof(Ipp32f);
int dstStep = dstSize.width*sizeof(Ipp32f);
buf = ippsMalloc_8u( bufsize );
if(buf != NULL) ippiResizeSqrPixel_32f_C1R(src, srcSize, srcStep, srcRect, dst, dstStep, dstRect,dx,dy, 0, 0, IPPI_INTER_LINEAR, buf);
if(buf != NULL) ippsFree( buf );
