REPORT chen-rr0343/IDIAP Video Text Segmentation Using Particle Filters Chen, Datong Odobez, Jean-Marc EXTERNAL http://publications.idiap.ch/attachments/reports/2003/rr03-43.pdf PUBLIC Idiap-RR-43-2003 2003 IDIAP May 2003 published in Int. Journal of Pattern Recognition and Artificial Intelligence This paper presents a probabilistic algorithm for segmenting and recognizing text embedded in video sequences based on adaptive thresholding using a Bayes filtering method. The algorithm approximates the posterior distribution of segmentation thresholds of video text by a set of weighted samples. The set of samples is initialized by applying a classical segmentation algorithm on the first video frame and further refined by random sampling under a temporal Bayesian framework. This framework allows us to evaluate an text image segmentor on the basis of recognition result instead of visual segmentation result, which is directly relevant to our character recognition task. Results on a database of 6944 images demonstrate the validity of the algorithm.