- 期刊
- OpenAccess
An Efficient Auto Focus Method for Digital Still Camera Based on Focus Value Curve Prediction Model
並列摘要
This paper models focus value curve from point light source to focus measure calculation. This model shows that focus values of one object in a scene will form a single peak bell-shaped curve in camera. Our proposed auto focus method adopts this model with focus sub-window selection to predict the peak of focus value curve. Accurate prediction for the best-focused lens position will greatly shorten search time. Besides, the period of focus value feedback from camera chip is further considered to determine lens step in one period to optimize practical time consumption. Through experiments, our model for focus value curve is correct and proposed auto focus method efficiently shortens overall search time.
被引用紀錄
Tsun, C. H. (2014). 具有色偏修正能力之景色分類系統:設計及應用 [doctoral dissertation, National Chiao Tung University]. Airiti Library. https://doi.org/10.6842/NCTU.2014.00812
藍美欣（2013）。半自動化單視角影像2D轉3D技術〔碩士論文，國立臺北科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0006-1608201321243100