Time-space saliency detection method for video processing

The invention discloses a time-space saliency detection method for video processing. The method is characterized by comprising steps: a color channel histogram, an optical flow size histogram, and an optical flow direction histogram are used for acquiring feature contrast; as for a first-frame image, the distance with a video frame center point is adopted to serve as a position priori, and as for other frames, the position of a saliency target in the former frame serves as a position priori, and a position priori saliency map is acquired; the optical flow size and the optical flow direction of a pixel are used to acquire a speed priori saliency map and an acceleration priori saliency map; a sliding window in time dimension is provided for pixel mean filter, and a background priori saliency map is acquired; and the feature contrast is fused with each priori saliency map, a time-space saliency map is acquired, and the target is detected. The method is more applicable to detection on surveillance video with an unknown moving target appearing position, and the moving saliency target can be better acquired.