... Khodngctich.h giiia hai t~p A, Bav:(rCzdcilinh: h(A,B)=max{d(A,B),d(B,An.Khi il6 hldmetrictren.H(X).Chung minh.(i)h(A, B)=max{d(A, B), d(B, An=max{d(B, A), d(A, Bn=h(B, A).(ii)At ... d(C(V), C(U))}=h(C(U), C(V))0,,'",3. CHUYEN DOl RASTER VA VECTORNhir da noi6'tren,de'bi~u di~n cac anh noi chung va hh duong net noi rieng thong thiro'ng tadung ... khOng thfch hop chocac doi ttro'ng nhir ao, h~""Hai la, vec to' hca theo direng birn (hlnh l.b), dang nay rat thfch ho'p doi v&i cac doitiro'nglaao, h~vv:a)...