Auto-focus Algorithm Using Variance of Difference (VoD) of Adjacent Pixels

인근 픽셀 차이 값의 분산(VOD)을 이용한 자동 초점 조절 알고리즘

In this paper, we propose a new auto focus algorithm using variance which estimate spread characteristic of image. In the proposed algorithm, the focus value is calculated via variance of difference between two adjacent pixels. This algorithm, we propose, show much more sharp focus curve than any other algorithms. It is shown experimentally that the proposed auto focus algorithm can be a efficient alternative to existing Tenengrad-based auto focusing algorithms.