?url_ver=Z39.88-2004&rft_id=10.1109%2FICSPCS.2015.7391778&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Kajo&rft.au=Kajo%2C+I.&rft.aufirst=I.&rft.date=2015&rft.title=Motion+estimation+of+crowd+flow+using+optical+flow+techniques%3A+A+review&rft.isbn=9781467381185&rft.genre=proceeding