# Point Feature Histograms Calculation.

To compute a single PFH representation from a k-neighborhood, we use:

```
computePointPFHSignature (const pcl::PointCloud<PointInT> &cloud,
const pcl::PointCloud<PointNT> &normals,
const std::vector<int> &indices,
int nr_split,
Eigen::VectorXf &pfh_histogram);
```

How can I calculate vector indices which represents the set of k-nearest neighbors from cloud?