View
221
Download
0
Category
Preview:
Citation preview
7/30/2019 Danh Muc Hinh Ve
1/3
ix
DANH MC CC HNH V, TH
Hnh 1.1: M hnh giu thng tin trong nh ....................................................trang 4
Hnh 1.2: Phn loi watermarking .......................................................................... 9
Hnh 1.3: Phn loi cc thut ton watermarking da trn min bin i dng cho
qu trnh nhng watermarking...............................................................10
Hnh 1.4: Phn loi thut ton watermarking da vo ng dng ca watermarking11
Hnh 2.1: M hnh giu d liu dng tng qut......................................................15
Hnh 2.2: M hnh tng qut giai on nhng d liu ............................................17
Hnh 2.3: M hnh phn phi nh watermarked .....................................................18
Hnh 2.4: M hnh trch nh watermarked .............................................................19
Hnh 2.5: M hnh giai on pht hin watermark .................................................20
Hnh 2.6: M t nhy tng phn .....................................................................23
Hnh 2.7: M t hm mt chi. .........................................................................24
Hnh 2.8: Hiu ng Mach band..............................................................................24
Hnh 3.1: Bin i Fourier.....................................................................................33
Hnh 3.2: Bin i Fourier thi gian ngn.............................................................35
Hnh 3.3: Bin i Wavelet ...................................................................................38
Hnh 3.4: M t cc min bin i ca tn hiu .....................................................38
Hnh 3.5: Sng sin v wavelet ..............................................................................39
Hnh 3.6: Cc thnh phn sng sin vi cc tn s khc nhau .................................40
Hnh 3.7: Cc thnh phn wavelet tng ng vi cc t l v v tr khc nhau........41
Hnh 3.8: Bin i wavelet ri rc ca tn hiu ......................................................44
Hnh 3.9: Qu trnh phn tch tn hiu dng bin i DWT mt chiu ..................44
7/30/2019 Danh Muc Hinh Ve
2/3
x
Hnh 3.10: Minh ho DWT hai chiu cho nh.......................................................45
Hnh 3.11: Phn tch tn hiu a mc....................................................................46
Hnh 3.12: Minh ho DWT kiu dyadic mc 3 ....................................................46
Hnh 3.13: Qu trnh phn tch v tng hp a mc dng DWT ............................47
Hnh 3.14: B lc hai knh cho dy m ha v gii m mt chiu .........................48
Hnh 3.15: Hm (t)ca bin i Haar ..................................................................50
Hnh 3.16: Hm (t) ca h bin i Daubechies n vi n=2, 3, 4, 5.......................51
Hnh 3.17: Mt vi hm (t)ca cc cp h bin i Biorthogonal........................52
Hnh 3.18: Hm (t) ca h bin i Coiflets ........................................................52
Hnh 3.19: Mt vo hm (t) ca h bin i Symlets...........................................53
Hnh 3.20: Hm (t )ca bin i Morlet..............................................................53
Hnh 3.21: Hm (t )ca bin i Mexican Hat ....................................................54
Hnh 3.22: Hm (t ) ca bin i Meyer.............................................................54
Hnh 4.1: Khi 8x8 nh rng cy...........................................................................57
Hnh 4.2: S khi qu trnh to watermark .......................................................59
Hnh 4.3: S watermarking tng qut dng Wavelet.........................................61
Hnh 4.4: Kt qu phn tch DWT nh ..................................................................63
Hnh 4.5: S thc hin nhng watermark..........................................................66
Hnh 4.6: S thc hin trch watermark ............................................................67
Hnh 4.7: S m tnh watermarked trong thc t ...........................................68
Hnh 5.1: Cc tn cng ln nh watermarked.........................................................70
Hnh 5.2: Phn loi tn cng v ..........................................................................72
Hnh 6.1: Lu gii thut qu trnh nhng watermark.........................................76
7/30/2019 Danh Muc Hinh Ve
3/3
xi
Hnh 6.2: Lu gii thut qu trnh trch watermark ...........................................77
Hnh 6.3: Lu gii thut phn tch wavelet 1D a mc .....................................78
Hnh 6.4: Lu gii thut khi phc wavelet 1D a mc ....................................78
Hnh 6.5: Lu gii thut phn tch wavelet 2D a mc .....................................79
Hnh 6.6: Lu gii thut khi phc wavelet 2D a mc ....................................80
Hnh 7.1: Giao din mphng watermarking nh s dng wavelets ......................84
Hnh 7.2: Qu trnh nhng nh copyright vo trong nh gc Lena. ........................85
Hnh 7.3: PSNR, Correlation ca nh nhng vi cc bng tn khc nhau.............92
Hnh 7.4: PSNR, Correlation nh nhng tng ng vi cc hm wavelets khc
nhau: Haar, db1, db2, db3, sym2, bior1.1, bior1.3 ..................................94
Recommended