std::vector<std::vector<BorderPixel>> ComputeBorderLabels(const Superpixels& spc)
{
slimage::Image1i labels = spc.ComputeLabels();
std::vector<std::vector<BorderPixel>> border_pixels(spc.cluster.size());
for(unsigned int cid=0; cid<spc.cluster.size(); cid++) {
border_pixels[cid] = ComputeBorderLabels(cid, spc, labels);
}
return border_pixels;
}
std::vector<unsigned int> ComputeAllBorderPixels(const Superpixels& superpixels)
{
slimage::Image1i labels = superpixels.ComputeLabels();
std::set<unsigned int> u;
int face_neighbours[] = { -1, +1, -static_cast<int>(labels.width()), static_cast<int>(labels.width()) };
for(unsigned int y=1; y<labels.height()-1; y++) {
for(unsigned int x=1; x<labels.width()-1; x++) {
int q = labels.index(x,y);
unsigned int lc = labels[q];
for(unsigned int i=0; i<4; i++) {
if(labels[q + face_neighbours[i]] != lc) {
u.insert(q);
}
}
}
}
return std::vector<unsigned int>(u.begin(), u.end());
}
