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Lighting and optical tools for image forensics.

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Call No.	Ph.D. 2007
Author	Johnson, Micah Kimo.
Title	Lighting and optical tools for image forensics.
Date	2007
Abstract	We present new forensic tools that are capable of detecting traces of tampering in digital images without the use of watermarks or specialized hardware. These tools operate under the assumption that images contain natural properties from a variety of sources, including the world, the lens, and the sensor. These properties may be disturbed by digital tampering and by measuring them we can expose the forgery. In this context, we present the following forensic tools: (1) illuminant direction, (2) specularity, (3) lighting environment, and (4) chromatic aberration. The common theme of these tools is that they exploit lighting or optical properties of images. Although each tool is not applicable to every image, they add to a growing set of image forensic tools that together will complicate the process of making a convincing forgery.
Description	v, 102 leaves : ill. 28 cm.
Format	application/pdf
Advisor	Hany Farid
Subject	Image analysis. Image processing -- Digital techniques. Photography -- Retouching. Photographs -- Forgeries. Lighting. Optics. Forensic sciences.
College	Dartmouth College -- Department of Computer Science.
Issuing Body	Dartmouth Dissertations are made available through the Dartmouth Digital Library.
Degree	Thesis (Ph.D.)--Dartmouth College.
Copyright	All rights reserved. No part of this book may be reproduced in any form by any electronic or mechanical means without permission in writing from the author.
DOI	http://dx.doi.org/10.1349/ddlp.141

Title	Page 1
Format	application/pdf
Issuing Body	Dartmouth Dissertations are made available through the Dartmouth Digital Library.
Degree	Thesis (Ph.D.)--Dartmouth College.
Full Text	Lighting and Optical Tools for Image Forensics A Thesis Submitted to the Faculty in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Computer Science by Micah Kimo Johnson DARTMOUTH COLLEGE Hanover, New Hampshire September 21, 2007 Examining Committee: (chair) Hany Farid, Ph.D. Jessica Fridrich, Ph.D. Fabio Pellacini, Ph.D. Peter Winkler, Ph.D. Charles Barlowe, Ph.D. Dean of Graduate Studies

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Lighting and optical tools for image forensics.

Lighting and optical tools for image forensics.