一种点阵码的自动识别方法

A Method for Automatic Identification of Dots on Films

对电影经纬仪和高速摄影机所拍摄胶片的阵列码点分布形式进行了分析,建立了基于点间描述和点描述的模型。介绍了一种码点自动识别简便算法,基于所建立点描述模型,采用对比度和空间判据对阵列码点进行识别,讨论了判据中可变参数调整对各种码点缺陷的适应性。针对拍摄条件恶劣和冲洗存放不当导致的成像劣化胶片,可用该方法完成准确判读。与经典的阈值方法作以比较,发现该方法有很好的判读适应性,且不易产生误漏判,误帧率小于1/1000。

The image quality of films taken by high-speed cameras is affected by shooting,developing and storing status. Recognization of matrix dots on poor quality films using traditional threshold method brings dots misread. In this paper, we present a concise method for automatic dot recogniaztion of dots on poor quality films.By using contrast and space criterions,and discussing parameters relative to them,the accuracy of dot recognization is increased.With this method,the frame recognition error rate is better than 1/1000。