Term Project Reportv2
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Transcript of Term Project Reportv2
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1
HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY
SCHOOL OF ELECTRONICS AND
TELECOMMUNICATIONS
TERM PROJECT
REPORT
Subject:
DIGITAL WATERMARKING
PROCESS
Student: Bui Duy Do
Student ID: 2010!"#
C$%&&: EEE ' ()*
Le+tu,e,: -,o. T,uon/ Con/ T%n/
H N3i4 10'201)
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PREFACE
Fi,&t4 I e56,e&& ou, /,%titude to -,o.7 T,uon/ Con/ T%n/ 8o %& t%u/t 9e
%nd 9y .,iend& %,iou& tin/& in ti& &e9e&te,7
In ti& ,e6o,t4 I;9 &u,e te,e 9u&t
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DIGITAL WATERMARKING PROCESS
I. WATERMARKING PROCESS
e &u66o&e t%t te o,i/in%$ i9%/e &ie i& N7 At .i,&t4 te o,i/in%$ i9%/e i&
+one,ted in to /,%y i9%/e7 A.te, t%t4 te luminance component of the/,%y i9%/e i& diided **
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F"#u$e 1. W%te$&%$'"(# )$*ce++ ,"%#$%&.
In te e9
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F"#u$e . DCT c*e22"c"e(t+ 3"c %$e u+e, 2*$ 3%te$&%$' b"t+.
Te DCT
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F"#u$e . W%te$&%$'e, I&%#e 3"t DCT R;
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F"#u$e 5. Detecting W%te$&%$' )$*ce++ ,"%#$%&
A& 8e +%n &ee in te di%/,%94 te 8%te,9%,=ed i9%/e i& diided into *5*
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E>PERIMENTS RESULTS
F"#u$e ?. O$"#"(%- "&%#e
F"#u$e @. M*,"2"e, #$%4 "&%#e
F"#u$e . Watermarked i&%#e
F"#u$e B. Watermark i&%#e
17 M*,"24 te3%te$&%$' +t%b"-"t4 c*(+t%(tR
Te i9%/e& i& de/,%ded 8en 8e in+,e%&e R %& &o8n in Fi/7 %nd Fi/7 7
He,e i& te &6e+t,u9 o. te t8o i9%/e:
F"#
u$e 10. Spectrum of w%te$&%$'e, I&%#e
3"t DCT R;
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F
"#u$e 11. Spectrum of w%te$&%$'e,
I&%#e 3"t DCT R; ==
A& 8e +%n &ee4 te ene,/y i& 9%in$y +on+ent,%ted in te $o8 .,euen+y do9%in7
In F"#.114 8e +%n &ee t%t te ene,/y di&t,i
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F"#u$e 1. Watermarked
i&%#e 3"t < ! < b-*c'+F"#u$e 1
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Lo8'6%&& .i$te, i& % .i$te, t%t 6%&&e& &i/n%$& 8it % .,euen+y $o8e, t%n %
+e,t%in +uto.. .,euen+y %nd %ttenu%te& &i/n%$& 8it .,euen+ie& i/e, t%n te
+uto.. .,euen+yM
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F"#u$e 1. Extracted watermark i&%#e %2te$ %))-4 "#8)%++G%u++"%( 2"-te$
e +%n &ti$$ dete+ted te 8%te,9%,= i9%/e7 Be+%u&e in te
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57 A(%-4/e te $e+u-te, "&%#e+.
The performance results are analyzed based on ea! "i#nal to
$oise %atio &"$%' and (e ha)e te "#e$ PSNR "(,"c%te+ t%t te
$ec*(+t$uct"*( "+ *2 "#e$ u%-"t4.
T%b-e . PSNR *2 M*,"2"e, "&%#e 0+ W%te$&%$'e, "&%#e
T4)e *2 &*,"2"e,PSNR: Modied image vs
Watermarked image
%te,9%,=ed 72#)2
odi.ied &t%
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t is only applicable to #ray ima#es &,olorful ima#es need
more consideration'.
The resolution of the (atermar!ed ima#es is not )ery hi#h.
,ant stand a#ainst noise.
n the future (ill learn about
/nhancin# the -uality of (atermar!ed ima#e and the
ability to stand a#ainst outside noise.
d*ust the method from #rey ima#es to colorful ima#es
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REFERENCES
17 tt6:@@8887&ti.tun/'&8=7de@9%t$%
