void sha1_init(size_t user_kpc)
{
kpc = user_kpc;
load_source();
createDevice();
createkernel();
create_clobj();
}
/*----------------------------------------------------------------------------*/
int gauss_frame(my1IFrame *src, my1IFrame *dst, float sigma, float *over)
{
my1Kernel kernel;
/* computing MY 2D gaussian smoothing kernel */
int loop = 0, loop2, index = 0;
float temp = 1.0, corner;
float mult, value;
while(temp>THRESH)
{
temp = fgaussian2d(loop,loop,sigma);
corner = temp;
loop++;
}
value = 1.0/corner;
int windowsize = (loop*2)-1;
int count = windowsize/2;
int length = windowsize*windowsize;
float *pcoeff = (float*) malloc(length*sizeof(float));
if(pcoeff==0x0)
return -1;
for(loop=0;loop<windowsize;loop++)
{
for(loop2=0;loop2<windowsize;loop2++)
{
if(over)
mult = value * (int)fgaussian2d(loop-count, loop2-count, sigma);
else
mult = fgaussian2d(loop-count, loop2-count, sigma);
pcoeff[index++] = mult;
}
}
if(over) *over = value;
if(createkernel(&kernel,windowsize)==0x0)
{
free(pcoeff);
return -1;
}
setkernel(&kernel, pcoeff);
kernel.orig_x = count;
kernel.orig_y = count;
free(pcoeff);
correlate_frame(src, dst, &kernel);
freekernel(&kernel);
return 0;
}
/*----------------------------------------------------------------------------*/
int laplace_frame(my1IFrame *src, my1IFrame *dst)
{
float coeff[] = { 0.0,-1.0,0.0, -1.0,4.0,-1.0, 0.0,-1.0,0.0 };
my1Kernel kernel;
if(createkernel(&kernel,3)==0x0)
return -1;
setkernel(&kernel,coeff);
kernel.orig_x = 1;
kernel.orig_y = 1;
correlate_frame(src,dst,&kernel);
freekernel(&kernel);
return 0;
}
