Bilateral kernel-based Region Detector

In this paper, we present a new method for a locally adaptive region detector called Bilateral kernel-based Region Detector (BIRD). This work is to detect stable regions from images by consecutively computing a multiscale decomposition based on the bilateral kernel. The BIRD regards a region as covariant if it exhibits predictability in its photometric distance over spatial distance. Distinctiveness and robustness across scales are achieved by selecting the extremely stable regions through sequential scales. Our method is simple and easy to implement. Experimental results show that our method outperforms competing affine region detection methods in efficiency on region detection.