Fragile Watermarking Algorithm by Sushrutha and Vikram

8/7/2019 Fragile Watermarking Algorithm by Sushrutha and Vikram

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A Fragile Watermarking AlgorithmA Fragile Watermarking Algorithm

Based on Logistic System and JPEGBased on Logistic System and JPEG

Under the Esteemed Guidance of

SRI K.AMARENDRA

Associate Professor & HOD

Department of CSE

PRESENTED BY

SUSRUTHA CHINNI

(07U41A0548)

KUNA PRAVEENA

(07U41A0523)

N.VIKRAM RAJU

(07U41A0532) V.RAJA

(07U41A0553)



What is a Watermark ?What is a Watermark ?

v

v

vWatermark

l Recognizable image or pattern in paper that appears lighter when

viewed by transmitted light.A watermark is often a faded image or

text used as a background of a slide. Watermarks are sometimes

used in the form of a logo, discreetly placed on a slide to brand the

presentation.

Eg: Currency Notes and Logos



What is Digital Watermarking ?What is Digital Watermarking ?

vA digital watermark is a digital signal or pattern inserted into a digital

document such as text, graphics or multimedia, and carries information

unique to the copyright owner, the creator of the document or the

authorized consumer.

vMessage is a group of bits describing information pertaining to the signal

or its author.

v



History of Lena(Lenna)History of Lena(Lenna)

vLena Sjooblom, (also spelled Lenna by many publications) was the Playboy playmate in November 1972 and rose to fame in thecomputer world when researchers atthe University of SouthernCalifornia scanned and digitized her image inJune 1973.



Working ThemeWorking Theme

Watermarkin

gAlgorithm

WatermarkedImageOriginalImage

Watermark



Watermarking ProcessWatermarking Process



Classification of WatermarkingClassification of Watermarking



Visible WatermarkingVisible Watermarking

vIn Visible Watermarking, the information is visible in the picture or

video. Typically, the information is text or a logo, which identifies

the owner of the media. The image on the right has a visible

watermark. When a television broadcaster adds its logo to the corner

of transmitted video, this also is a visible watermark.



Invisible WatermarkingInvisible Watermarking

vIn invisible digital watermarking, information is added as digital data

to audio, picture, or video, but it cannot be perceived as such (although

it may be possible to detect that some amount of information is hidden

in the signal)



Concept DevelopmentConcept DevelopmentvRobust Watermark

l Embedded invisible watermarks.

l Resist to image processing or attacks.

l Used for copyright protection or to verify the ownership.

vFragile Watermark l Mainly used for the authentication and integrity verification of the images transmitted through internet

has attracted more attention in the research and industrial communities.

l Used for tamper detection

vSemi Fragile Watermark l Sensitive to signal modification

l Feature of both robust & Fragile watermark.

l Provides data authentication



v Blind Watermark (or) Public Watermark

The original signal is not needed during the detection process to detect the mark.

v Non Blind Watermark (or) Private Watermark

The original cover signal is required during the detection process.

v Semi –Blind Watermark

§ In Particular some Watermarking Schemes require access to the ‘Published’

watermarked signal ,that is the original signal just adding the Watermark.

v Asymmetric Watermark (or) Public Key Watermark

The detection process (and in particular the detection key) is fully known to

anyone as opposed to blind watermarking where a secret key is required. So

here, only a 'public key' is needed for verification and a 'private key' (secret) is

used for the embedding though.



Steganography V/S watermarkingSteganography V/S watermarking

vWatermarking the hiding data is used to protectthe original image (e.g. copyrightmanagement)

vSteganography the image is used to protect thehiding data (e.g. secret message).



Drawbacks of Existing SystemDrawbacks of Existing System

vIllegal Copyingv

vFalsificationv

v No Copyright Protectionv

v No Ownership Identification

v No Robustness



Proposed SystemProposed System

vDue to above mentioned failures a new technique has been

proposed so that to cover and maintain the drawbacks prevailed in

the previous system and hence a technique called Fast Hadamard

Transformation(FHT) is proposed.

vThe FHT embedding algorithm was found to provide a robust and

efficient approach to perform digital watermarking of digital image

data for copyright protection and proof of rightful ownership.



Admin

+Username

#password

Images

+JPEG

+change_view()

+Loading()

+verification()

+Tamper_Location()

Algorithm

+Fragile_WaterMarking()

+Logistic_System()

Load image

1..*1

depends on

1

1

Fig 1:Class Diagram for Fragile Watermarking



System

Admin

Login

Username & password

Invalid user

<<extend>>

select image folder

Change image view

Quit

Watermark image

Change the image mode

Fig 2 : Use Case Diagram for Fragile Watermarking



AdminSystem AlgorithmLogin

1 : Username

,password()2 : Verification()

3 : Authorized Person()

4 : Select image folder()

5 : Load image()

6 : Apply image view()

7 : Change view()

8 : Load Output()

9 : Show Output()

Fig 3:Sequence Diagram for Fragile Watermarking



Login

valid user

Invalid user

Select image folder

Change image view

Watermark the image

exit

Fig 5:Activity Diagram for Fragile Watermarking



Output ScreensOutput Screens

Fig 1: login form for user



Fig 2: Before Importing the images



Fig 3:After Importing the Images



Fig 4 :Adjusting the Mode



Fig 5: Process for applying watermark text to Image



Fig 6: Inserting the Watermark Text to the Selecting Image



Fig 7 : Starting the Progress bar



Fig 8: Watermark Image



Fig 9 : Process to View the Slide Show



Test Case ReportsTest Case Reports

Test No. Test Case Expected Output Actual Output Result

1. Invalid Log In Test: By providing invalidUser name andPassword

A dialog Box to bedisplayed sayingInvalid Login, AccessDenied

A dialog Box isdisplayed sayingInvalid Login, AccessDenied

Passed

2. Valid Log In Test: Byproviding Valid Username and Password

The Text Screen foraccepting the text tobe shown

The Text Screen foraccepting the text isshown

Passed

3. Invalid input test: By providing invalid input images

It will not showimages

It will show error onruntime

passed

4. Valid input test: By providing valid input images(jpeg)

It will show images It will show images passed



Fig 1 :Test case Report Screen



ApplicationsApplications

vCopyright protection :Digital watermarks can be used to Identify and protect copyright ownership.

v Tracking : Digital watermarks can be used to track the usage of digital

content.

vBroadcast Monitoring: Digital watermarks can be used to monitor

broadcasted content like television and broadcast radio.

vContent protection for audio and video content.

vDocument and image security.

v

v



vAuthentication & integrity verification :

§Watermarks should be able to detect even the slightest

change in the document.

§A unique key associated with the source is used the

create the watermark and then embed in the document.

§This key is then used to extract the watermark and the

integrity of the document verified on the basis of the

integrity of the watermark



AdvantagesAdvantages

vFragile Watermarking Algorithm

vCopyright Protection.

vApplicable to all content types (images, documents,

movies, music, TV)

vFHT(Fast Hadamard Transformation)

§ Shorter processing time

§ Invisibility of the watermark guaranteed

§ Increased watermark energy leads to higher robustness



DisadvantagesDisadvantages

vThe blind watermarking algorithm which is really robust

is not in existence today.

vBy knowing the exact content of watermark and

algorithms to embedded and retrieve it.

vHacker can erase the watermark easily ,by knowing the

exact content of watermark and algorithms to

embedded and retrieve it .



ConclusionConclusion

v The large need of networked multimedia system has created the need

of COPYRIGHT PROTECTION .It is very important to protect

intellectual properties of digital media.

v Internet playing an important role of digital data

transfer. Digital watermarking is the great solution of the problem

of how to protect copyright. Digital watermarking is the solution

for the protection of legal rights of digital content owner and

customer.



BibliographyBibliography

1)R Van Schyndel, A Trikel, C Osborne. A digital watermark. Proceedings of

IEEE International Conference on Image Processing, ICIP1994

2) R Wolfgang, E Delp. A watermark for digital images. Proceedings of the

IEEE International Conference on Image Processing, ICIP1996

3) YU Miao, HE Hongjie, ZHANG Jiashu. A digital authentication

watermarking scheme for JPEG images with superior localization and

security. Science in China Series F: Information Sciences. 2007

4)http://www.Scribd.com

5)http://www.seminarprojects.com

6)http://www.metois.com



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Fragile Watermarking Algorithm by Sushrutha and Vikram

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