Content based image and video retrieval techniques have emerged as the times require , which combine the multi - disciplinary such as image understanding , computer vision , database technique and artificial intelligence etc . it has many advanced aspects such as objective and flexible description , highly automatic input process and wide application areas etc , which has been paid more and more attentions and developed rapidly 基于內容的檢索技術應運而生,它綜合了圖像理解、計算機視覺、數據庫和人工智能等多學科知識,具有內容描述客觀、方便、靈活,入庫自動化程度高,應用前景廣闊等諸多優(yōu)點,受到了越來越廣泛的重視,并得到了迅速的發(fā)展。