Compass Detection Algorithm based on Image Corner

To improve the Features from Accelerated Segment Test (FAST) algorithm such as artificial threshold setting and the choice and ordering of continuous points on circle, a novel compass detection algorithm is proposed.The algorithm uses four compasses as the test mask and calculates threshold value based on image intensity feature.Four compasses are used to pre-detect corners.In order to improve the location accuracy of corners, pseudo response on skewed edges is eliminated.Finally, multiple adjacent responses are tackled by keeping only points which have extremal value of Laplacian.Comparative experiments between FAST and the proposed algorithm are carried out with respect to validity, robustness and efficiency.The results show that the detected corners by the proposed algorithm are accurately located and well-distributed.