Method for converting flat video to tridimensional video based on real-time dialog between human and machine

The invention relates to a method for changing a plane video to a stereoscopic video, based on real time human-computer conversation, which belongs to the multimedia technical field of computers. The method comprises that: a computer divides a whole video sequence into sub-sequences that have related contents; a user designates any frame of each sub-sequence as a key frame; the computer carries out wave-filtration to all plane video frames to enhance image edge information and sharpen the edge of the foreground objects of the video frame; foreground object segmentation is carried out to the key frames and non-key frames and profile curves and depth maps are extracted until depth map sequences corresponding to all the frames of the original plane video sequence are generated; the smoothed depth map sequences are utilized for rendering and generating multi-visual angle views corresponding to each moment, and the views are synthesized into stereoscopic video frames; the stereoscopic video frames of all the moments are composed into the stereoscopic video sequences. As the method is based on the real time human-computer conversation, the precise depth map of each frame can be obtained, thus well realizing the changing from the plane video to the stereoscopic video and finally obtaining the stereoscopic video with better effect.