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DIGITAL IMAGETAMPERING

PRESENTED BYPRIYA SINGHM. TECH. 2 ND YEAR C.S.E. (1306810718)

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POINTs TO PRESENT

IntroductionDigital Image TamperingTypes of Image TamperingImage Tampering Detection Approaches

Need for Tampering DetectionConclusion and Future ScopeReferences

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INTRODUCTION

In todays world it is easy to manipulate the image by adding or remo ing some elements from the

image which result in a high number of imageforgeries!"sing the manipulation tools that are a ailable

on internet it is easy to tamper the digital images

without any trace! Therefore# erification oforiginality of images has become a challengingtas$!

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DIGITAL IMAGE TAMPERING

The term image tampering refers to the processof manipulation of image information that is not

acceptable!

%i$e changing the ob&ects in the image#retouching the image# combining two images# etc!

The e'ample is shown below(

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DIGITAL IMAGE TAMPERING(c !"#!$%&')

)a* the original image with three missiles)b* The forged image with four missiles

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TYPES O IMAGE TAMPERING

Composite Image )Splicing*

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TYPES O IMAGE TAMPERING(c !"#!$%&')

IMAGE RETOUCHING

Image retouching is a slight change in the imagefor arious artistic and commercial purposes# notnecessarily conforming to the standards ofmorality!

The retouching is mostly used to enhance orreduce the image features!

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TYPES O IMAGE TAMPERING(c !"#!$%&')

E *+,-% #+*/% %" $c #!/

Retouching by a maga+ine in which the real face on right is

replaced with the left one

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TYPES O IMAGE TAMPERING(c !"#!$%&')

COPY MO EA portion of an image is copied somewhere else in the

same image!

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TYPES O IMAGE TAMPERING(c !"#!$%&')

COMPOSITE IMAGE OR SPLICING

A common form of photographic manipulation is thedigital splicing of two or more images into a singlecomposite image!

The photo compositing is the result of cutting and &oining of two or more photographs with seamlesstransition without lea ing any isual clues about the

&oining from other photographs!

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TYPES O IMAGE TAMPERING(c !"#!$%&')

E *+,-% C +, s#"% I+*/%

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IMAGE TAMPERING DETECTION

APPROACHESACTI E APPROACH

The area of acti e methods simply can be di ided intothe data hiding approaches! ,y data hiding we refer tomethods embedding secondary data into the image!

Acti e approaches assumes an inserting of a digitaldata at the source side )e!g!# Scanner* and erifying themar$ integrity at the detection side!

-'ample( Digital Signature# .ater /ar$ing# etc!

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IMAGE TAMPERING DETECTION

APPROACHES (c !"#!$%&')PASSI E APPROACH

0assi e methods are mostly based on the fact thatforgeries can bring into the image specific detectablechanges!

0assi e techni1ues for image forensics operate in the

absence of any watermar$ or signature! These wor$ onthe assumption that although digital forgeries may lea eno isual clues that indicate tampering# but they mayalter the attributes and statistics of an image!

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NEED OR IMAGE TAMPERING

DETECTIONDigital images are playing e ery important role in our

daily life! The digital images are omnipresent right from

the co er pages of &ournals# newspapers# maga+ines etc! toe idences in court rooms# teaching aids etc! Images areused e erywhere either as a personal memory e idencesor for official purposes!

Recently# the low cost cameras# sophisticated high endimage processing# computer graphics software# madeediting and manipulating images easier# hence it isessential to detect the forgeries in the images!

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RE ERENCES

[1] Shrishail Math and R.C. Tripathi Image Compositedetection using Customized Filtering International ournalo! Computer "raphics # $nimation %I C"$& 'ol.1( )o.*(

+cto,er - 11.[-] /rad0umna eshpande and /rashasti 2ani3ar /i4el 5ased igital Image Forger0 etection Techni6ues International ournal o! 7ngineering Research and $pplications %I 7R$& ( 'ol. -( Issue *( Ma08 un - 1-( pg. 9*:89;*

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THANYOU