private static int nms_comparator(SortableBbox a, SortableBbox b)
{
float diff = a.Probs[a.Index][b.Sclass] - b.Probs[b.Index][b.Sclass];
if (diff < 0)
{
return(1);
}
if (diff > 0)
{
return(-1);
}
return(0);
}
public static void do_nms_sort(Box[] boxes, float[][] probs, int total, int classes, float thresh)
{
int i, j, k;
SortableBbox[] s = new SortableBbox[total];
for (i = 0; i < total; ++i)
{
s[i].Index = i;
s[i].Sclass = 0;
s[i].Probs = probs;
}
for (k = 0; k < classes; ++k)
{
for (i = 0; i < total; ++i)
{
s[i].Sclass = k;
}
Array.Sort(s, nms_comparator);
for (i = 0; i < total; ++i)
{
if (probs[s[i].Index][k] == 0)
{
continue;
}
Box a = boxes[s[i].Index];
for (j = i + 1; j < total; ++j)
{
Box b = boxes[s[j].Index];
if (box_iou(a, b) > thresh)
{
probs[s[j].Index][k] = 0;
}
}
}
}
}