Stereo vision

an important branch of computer vision

is one of the wideest research area in Computer Vision.In prerious decades

a 1ot of characteristic approaches and theories were progressively Proposed In this area In this Paper

the State of fhe art of Stereo vision is expounded systematically

and the advantages and disadvantages of some important appreaches are discussed

With an emphasis on stereo matching atching

the key prob1em in stereo vision expounded Comprehensively.Findlly

the existing problems and future development in stereo vision are discussed.