A DAISY-like compass operator

The compass operator is a useful tool for the detection of edges, junctions and corners. However, it is time-consuming, especially when the circular window is large. In this paper, we propose a new compass operator based on the sampling scheme utilized in the DAISY descriptor. We first generalize the original DAISY for representing a variety of types of features. Then, the metric of measuring the difference between two wedges is derived with respect to the descriptor. Our DAISY-like compass operator in essence captures cues in multi-scales but is efficient. It achieves results on boundary detection which are comparable to the conventional compass operator.