A key technology of video caption detection and extraction for video indexing and retrieval is studied in this paper, and three algorithms are proposed: (1) A method for video caption extraction based on adaptive location and FCM segmentation: First video shot and text event are detected, and the caption region is located by the adaptive and projective method. Frame average method is employed in a series of video frames with the same caption for enhancing character. Then, the obtained colorful caption regio...