Xử lý ảnh số - Biểu diễn và miêu tả part 9 pptx

... .........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................f  bH`ınh 8. 19: Ph´ep co cu˙’a h`am d¯u.o..c cho trong H`ınh 8.18(a) bo.˙’i phˆa`ntu.˙’cˆa´utr´uc ... quan, h`am f(s + x) di chuyˆe˙’n sang tr´ai khi s du.o.ngv`a sang pha˙’i khi s ˆam. D - iˆe`ukiˆe.n(s + x) ∈ Dfv`a x ∈ Dbchı˙’ra rˇa`ng v`ung b nˇa`mho`an to`an trong ... o.˙’phˆa`n trˆen, ch´ung ta s˜e su.˙’du.ng da.ng cu˙’aPhu.o.ng tr`ınh(8.16). H`ınh 8. 19 minh ho.akˆe´t qua˙’cu˙’a ph´ep co h`am f trong H`ınh 8.18(a) bˇa`ng phˆa`ntu.˙’cˆa´utr´uc...

... A ⊗ B, c´o thˆe˙’d¯ i.nh ngh˜ıa theoph´ep biˆe´nd¯ˆo˙’i hit-or-miss:A ⊗B = A \(A ∗ B)= A ∩(A ∗ B)c. (8.7)D - ˆe˙’l`am g`ay A mˆo.t c´ach d¯ˆo´ix´u.ng hiˆe.u qua˙’ho.n, ... l`aC(A)=∪4i=1Di. (8.6)N´oi c´ach kh´ac, thuˆa.t to´an thu..chiˆe.n ph´ep biˆe´nd¯ˆo˙’i hit-or-miss tˆa.p A v´o.i B1cho d¯ˆe´nkhi d¯u.o..ca˙’nh khˆong thay d¯ˆo˙’i; sau d¯´o ... nho˙’v`a c´ac hˆo´he.p d`ai, khu.˙’bo˙’c´ac lˆo˜nho˙’.(I)Ph´ep biˆe´nd¯ˆo˙’iHit-or-MissA ∗ B =(A B1) ∩( AcB2)=(A  B1) \ (A ⊕ˆB2)Tˆa.p c´ac d¯iˆe˙’m (c´ac...

... 8.2: (a) D - u.`o.ng biˆen v`a lˆa´ymˆa˜ula.i; (b) kˆe´t qua˙’cu˙’alˆa´ymˆa˜ula.i; (c) m˜a x´ıch4-hu.´o.ng; (d) m˜a x´ıch 8-hu.´o.ng.tu.o.ng ´u.ng. D - iˆe˙’mbˇa´td¯ˆa`u ... thˇa˙’ng (x´acd¯ i.nh bo.˙’id¯ˆo.d`ai v`a hu.´o.ng). D - ˇa.cbiˆe.t, biˆe˙’udiˆe˜n n`ay du..a trˆen t´ınh 4- hay 8-liˆen thˆongcu˙’a c´ac d¯oa.n thˇa˙’ng. Hu.´o.ng ... vector ai. (Chˇa˙’ngha.n ai=3th`ıajx= −1,ajy=1).3. [D - ˆo.rˆo.ng v`a d¯ˆo.cao cu˙’a chu tuyˆe´n d¯´ong] D - ˆo.rˆo.ng w(a) v`a d¯ˆo.cao h(a)cu˙’a chutuyˆe´n d¯´ong...

... p3+ ···+ p 9 v`a S(p1)l`asˆo´lˆa`n chuyˆe˙’n tra.ng th´ai t`u.0 sang 1 trong d˜ay d¯u.o..csˇa´pth´u.tu..p2,p3, ,p 9 ,p2.Chˇa˙’ng ha.nv´o.i 8-lˆan cˆa.ncu˙’a ... Ngu.o..cla.i, nˆe´u c´o ba˙’y pixel trong 8-lˆan cˆa.ncu˙’a p1c´o gi´a tri.1 th`ı xo´a p1s˜e gˆay ra x´oi m`on v`ung. D - iˆe`ukiˆe.n (b) sai khi ´ap du.ngtrˆen nh ˜u.ng ... lˆan cˆa.n8cu˙’a n´o c´ogi´a tri.0. X´et 8-lˆan cˆa.n trong H`ınh 8.5. K´yhiˆe.u N(p1) l`a sˆo´c´ac pixel c´o gi´a tri.kh´acp 9 p2p3p8p1p4p7p6p5H`ınh 8.5: Sˇa´pxˆe´p...

... d¯iˆe˙’m a,b l`a tru.c ch´ınh cu˙’abiˆen. D - u.`o.ng k´ınh v`a tru.c ch´ınhl`a nh˜u.ng miˆeu ta˙’h˜u.u ´ıch cu˙’a biˆen.D - ˆo.cong l`a h`am phu.thuˆo.c v`ao hˆe.sˆo´g´oc. ... ....................................................................... x0x1y0= y1Tru.c thu..cxTru.ca˙’o√−1yH`ınh 8 .9: D - u.`o.ng biˆen sˆo´v`a biˆe˙’udiˆe˜nda.ng d˜ay sˆo´ph´u.c. C´ac d¯iˆe˙’m(x0,y0)v`a(x1,y1)l`a ... nˆe´uthay d¯ˆo˙’i nho˙’ho.n100hoˇa.cl`ag´oc nˆe´u thay d¯ˆo˙’ivu.o..t qu´a 90 0. Tuy nhiˆen nh˜u.ng miˆeuta˙’n`ay cˆa`nd¯u.o..csu.˙’du.ng mˆo.t c´ach cˆa˙’n...

... tu.˙’ho´a la.i th`anh mˆo.tda˙’iv´o.im´u.c x´am ´ıtho.nd¯ˆe˙’dˆe˜d`ang xu.˙’l´y.D - ˇa.t n l`a tˆo˙’ng sˆo´c´ac cˇa.pd¯iˆe˙’m trong a˙’nh thoa˙’t´ınh chˆa´t P (trong ... nhˆa´t. Chi tiˆe´tcu˙’a b`ai to´an d¯ˆo´i s´anh d¯u.o..c tr`ınhb`ay trong Chu.o.ng 9. Phu.o.ng ph´ap cˆa´utr´ucNhu.tr`ınh b`ay phˆa`nd¯ˆa`u, phu.o.ng ph´ap th´u.hai ... c´ac nguyˆen so.. C´ac kh´ai niˆe.m n`ay l`a co.so.˙’cu˙’a c´ac miˆeu ta˙’quanhˆe.-mˆo.tvˆa´nd¯ˆe`s˜e d¯u.o..c tr`ınh b`ay chi tiˆe´t trong Phˆa`n 8.5.Phu.o.ng...

... loa.ibo˙’c´ac lˆo˜hˆo˙’ng nho˙’v`a l`am d¯ˆa`y c´ac k˜e ho.˙’trong chu tuyˆe´n.2 59 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

... biˆe´nd¯ˆo˙’i Hit-or-MissPh´ep biˆe´nd¯ˆo˙’i Hit-or-Miss l`a mˆo.t cˆong cu.co.ba˙’nd¯ˆe˙’ph´at hiˆe.n h`ınh da.ng cu˙’a c´ac d¯ˆo´itu.o..ng: D - ˇa.t B := (B1,B2), ... B d¯ u.o..ckˆe´tho..ptu.o.ng ´u.ngv´o.inˆe`n. Ph´ep biˆe´nd¯ˆo˙’i Hit-or-Miss d¯i.nh ngh˜ıa nhu.sau:A ∗ B =(A  B1) ∩ (AcB2).Ngo`ai ra, su.˙’du.ng ... c´o thˆe˙’su.˙’du.ng trong qu´a tr`ınh biˆe˙’udiˆe˜n v`a miˆeu ta˙’h`ınh da.ng. D - ˇa.cbiˆe.t, ch´ung ta x´et c´ac thuˆa.t to´an d¯ˆe˙’tr´ıch ra c´ac d¯u.`o.ng biˆen,...

... nhiˆe`u.Ph´ep biˆe´nd¯ˆo˙’i top-hat. Ph´ep biˆe´nd¯ˆo˙’i top-hat h`ınh th´ai ho.c x´ac d¯i.nh bo.˙’ih = f −(f ◦b).Ph´ep biˆe´nd¯ˆo˙’i n`ay-nhu.tˆen go.icu˙’a n´o, su.˙’du.ng ... hˆo.pv´o.id¯ı˙’nh phˇa˙’ng-thu.`o.ng d`ung d¯ˆe˙’l`am nˆo˙’i c´ac chi tiˆe´tnˇa`m trong b´ong cu˙’ad¯ˆo´itu.o..ng.Phˆan d¯oa.nkˆe´tcˆa´u. D - ˆe˙’phˆan d¯oa.n c´ac ... vˆa.tthˆe˙’du..atrˆenkˆe´tcˆa´ucu˙’ach´ung ta c´othˆe˙’su.˙’du.ng c´ac ph´ep to´an mo.˙’v`a d¯´ong.D - od¯ˆo.ha.t. D - od¯ˆo.ha.t l`a mˆo.tl˜ınh vu..cgˇa´nliˆe`nv´o.iviˆe.c x´ac d¯i.nh...

... ••....................................•........................................................................•.........................................................................................•...........................................................................................................•.............................................................................................................................•...........................................................................................................................................•........................................................................................................................................................•.................................................................................................................................................................•.................................................................................................................................................................•...............................................................................................................................................•.............................................................................................................................••••••••••••rg(r)(a) (b)H`ınh 8.10: (a) D - oa.n biˆen; (b) biˆe˙’udiˆe˜n biˆen theo h`am mˆo.tbiˆe´n.d¯ u.o..csu.˙’du.ng ... d¯ˆo.s´ang v`a p(zj),j =1, 2, ,L, l`a biˆe˙’ud¯ˆo`cˆo.ttu.o.ng ´u.ng, trong d¯´o2 49 trong d¯´om =Ki=1νip(νi)l`a gi´a tri.trung b`ınh cu˙’a ν (v`a µ2l`a phu.o.ng...