Tuyen tap bao cao khoa bgc Hpi nghi Khoa hgc ky thuat Do luimg loan quoc lan thfl IV Hd Ngi, 11 • 2005 >iPHaONG PHAP XAY DUNG MANG NO RON BAT BIEN VOI PHEP QUAY ANH Phgm Trung Ddng Hgc vien Ky thudt qudn stf Tdm tdt: Ddi vdi cdc he thd'ng nhdn dgng dnh ndi chung vd cdc he thdng nhdn dgng dnh na ron ndi rieng, viec tgo cdt dd'u hieu nhdn dgng bd't bie'n ddi vdi phep quay ciia dnh dd'i tugng dong mgt vai trd rd't quan De nhdn difgc tdc dd'u hieu hdt bien ndy ngifdi ta cd the tiep cchi bdng cdc cdch khdc Trong do, xu hifdng si'f dung mgng na ron bd't bie'n dugc coi Id cd tnen vgng hem cd Khi dd, tinh chd't bd't hien (iia cdc dd'u hieu nhdn dgng dgt difffc nhd cd'u trite ciia mgng na ron Trong hdi bdo ndy, chuug tdi se trinh bdy mot cdch tgo mgng na rou bd't bie'u vdi phep quay dnh vd cdng ihi'fc hod viet tinh todn tifug phdn tif cua ma trdn trgng so no ron mgng na ron hdt bleu Cdch tiep can mdi ndy se cho phep chung tu de ddng tinh todn ciiug nhu can thiep vdo tham so mang Abstract: Invariance with respect to Image rotation is one of the main tasks of the imagerecognition system There are many ways to obtain the rotation-invariant recognition features, in which the using invariant neural network shows best promise In this paper, the creating Invariant neural network und the calculating weighted cofficieuts of neurons in this neural network are studied I DAT VAN DE Dfi'i vdi cdc hfi thd'ng nhdn dang anh ndi chung vd cdc he thd'ng nhdn dang anh no ron ndi rifing, vific tao cac dd'u hifiu nhan dang bat bie'n ddi vdi phep quay dd'i tugng anh ddng vai trd rd't quan trgng Di tao cac dd'u hifiu nhdn dang bd't bifi'n ngudi ta thudng sfl dung ky thudt chinh hodc nhd mfit sd bifi'n ddi loan hgc, hoac nhd su dung tap day Idn phan anh ddy du cdc tinh hudng quay anh cd the xay ra, hoac nhd mang no ron bdt bifi'n do'i vdi phep quay Trong dd xu hudng sfl dung mang no ron bat bien duoc coi la cd tri^n vong hon ca Khi tfnh cha't bdt bie'n ciia cac dau hieu nhan dang dat dugc nhd cdu triic cua mang no ron Nghifin cflu v^ vd'n dfi da dugc dfi cdp [1,2,31 Tuy nhifin cac nghifin cflu dd vific tfnh loan cac Irgng sd cua cac no ron mang no ron bd't bifi'n dugc Ihuc hifin theo cac budc bifi'n ddi ma trdn, hodc vecto trgng sd tuong dd'i phflc lap Trong bai bao chiing tdi se de xud't viec tfnh loan tflng phan tfl ciia vecto trgng sd theo mdt each khdc BIEN DOI ANH VA MANG NO RON BAT BIEN DOI VOl PHEP QUAY ANH Bai loan dat la cdn thie'i ke' mang no ron tao cac dd'u hifiu nhan dang bd't bifi'n ddi vdi phep quay anh di mdt gdc