Curriculum Vitae – İsmail Avcıbaş

 

Personal

Electrical-Electronics Engineering Department

Başkent University, Ankara, Turkey

Phone: +90 (312) 234 1010-(1237)

Fax: +90 (312) 234 1508

E-mail: avcibas@baskent.edu.tr

http://www.baskent.edu.tr/~avcibas

 

Education

Ph.D. Electrical-Electronics Engineering, Boğaziçi University, İstanbul, Turkey, 2001

Dissertation Title: Image Quality Statistics and Their Use in Steganalysis and Compression

 

M.S. Electronics Engineering, Uludağ University, Bursa, Turkey, 1994,

Thesis Title: Object Oriented Low Level Computer Vision

 

B.Sc. Electronics Engineering, Uludağ University, Bursa, Turkey, 1992

Senior Project Title: Development of Digital Signal Processing Algorithms for BILDET Data Acquisition Card

 

Teaching

 

Undergraduate

Signals and Systems I, Signals and Systems II, Digital Image Processing, Signal Processing Applications, Multimedia Systems, Computer Networks

 

Graduate

Data Compression, Detection Estimation Theory, Random Signal Analysis

 

Research Interests:

Data Compression, Image Processing, Multimedia Communication and Security, Multimedia Forensics, Steganography and Steganalysis, Pattern Recognition.

 

Multimedia Forensics

In the analog world, media content like photographs and tape recordings have generally been accepted as a "proof of occurrence" of the depicted event. In today's digital age, the creation and manipulation of multimedia content is made simple by digital processing tools that are easily and widely available. As a consequence, we can no longer take the authenticity of multimedia content, analog or digital, for granted especially when it comes to legal evidence. Media forensics, in this context, is concerned with determining some underlying fact about multimedia content. For example, given an image on may ask questions such as:

 

Similar questions can be asked about audio and video. The above questions are just a few instances of issues faced quite routinely by investigation and law enforcement agencies. However, there is a severe lack of techniques that could help them in finding authoritative answers. Although digital watermarks have been proposed as a tool to provide authenticity to multimedia, it is a fact that the overwhelming majority of content that is captured today does not contain a digital watermark. And this situation is likely to continue for the foreseeable future. Hence in the absence of widespread adoption of digital watermarks, the goal is to develop techniques that can help us make statements about the origin, veracity and nature of multimedia content.

 

Projects Involved:

“Digital Image Forensics”, TÜBİTAK KARİYER, 104E056, PI, 2004-2009.

 

Steganography and Steganalysis

The development of techniques for audio and image steganography, the practice of hiding a secret message within an innocuous cover medium, and the wide-spread availability of tools for it have led to an increased interest in steganalysis techniques for image and audio data. In this project we pioneered universal steganalysis techniques for audio and image data. Our approach is based on the hypothesis that hiding a secret message in audio or image data leaves definite artifacts that can be detected using statistical analysis. We have built a package which extracts a number of statistical features from a set of supplied cover and stego images and then build a classifier, which is then used to distinguish supplied images as either being clean or stego.

 

Projects Involved:

“US-Turkey Cooperative Research: Steganalysis Techniques for Images and Audio”, NSF

Award 0218074, Co-PI, 2002-2005.

“Steganalysis Based on Image and Audio Quality Metrics”, AFRL, Consultant, 2002-2004.

“Steganalysis of Digital Watermarking Techniques”, AFOSR, Consultant, 2001-2003.

 

Professional Experience

2007- ..., Associate Professor, Electrical-Electronics Engineering Department, Başkent University, Ankara, Turkey

2002-2006, Assistant Professor, Electronics Engineering Department, Uludağ University, Bursa, Turkey

2001- 2002, Lecturer, Electronics Engineering Department,Uludağ University, Bursa, Turkey

1997-2001, PhD student, Electrical-Electronics Engineering Department,Boğaziçi University, Bursa, Turkey

1999-2000, Research Fellow, Computer and Information Sciences, Polytechnic University, Brooklyn, NY, USA.

1999-1999, Research Fellow, Electrical Engineering, University of Nebraska at Lincoln, NB, USA.

1998-1999, Lecturer, Electronics Engineering Department,Uludağ University, Bursa, Turkey

1993-1997, Research Assistant, Electronics Engineering Department, Uludağ University, Bursa, Turkey

 

Awards

TOFAŞ 1991 – 92, undergraduate fellowship

TOFAŞ 1992 – 93, graduate fellowship

TÜBİTAK 1997-99, Integrated PhD fellowship

NSF 2000-2000, 6 months, research fellowship, awarded by project No: 9996097

 

Publications

Journal Publications

 

·        Koçal, O., E. Yürüklü, İ. Avcıbaş, “Chaotic Type Features for Speech Steganalysis”, IEEE Transactions on Information Forensics and Security, accepted, (2008).

·        Çeliktutan, O., B. Sankur, İ. Avcıbaş, “Bilind Identification of Source Cell-phone Model”, IEEE Transactions on Information Forensics and Security, to appear, (2008).

·        Gül G., A. E. Dirik, İ. Avcıbaş, “Steganalytic Features for JPEG Compression Based Perturbed Quantization”, IEEE Signal Processing Letters, 14, 205-207, (2007).

·        Bayram S., İ. Avcıbaş, B. Sankur, N. Memon, "Image Manipulation Detection", Journal of Electronic Imaging, 15, 041102-1 - 041102-17, (2006).

·        Özer H., B. Sankur, N. Memon, İ. Avcıbaş, “Detection of Audio Covert Channels Using Statistical Footprints of Hidden Messages”, Digital Signal Processing, 16, 389-401, (2006).

·        Avcıbaş, İ., “Audio Steganalysis With Content Independent Distortion Measures,” IEEE Signal Processing Letters, 13, 92-95, (2006).

·        Avcıbaş, İ., M. Kharrazi, N. Memon, B. Sankur, “Image Steganalysis With Binary Similarity Measures,” EURASIP Journal on Applied Signal Processing, 17, 2749-2757, (2005).

·        Avcıbaş, İ., N. Memon, B. Sankur, K. Sayood, “A Succesively Refinable Lossless Image Coding Algorithm,” IEEE Transactions on Communications, 53, 445-452, (2005).

·        Avcıbaş, İ., N. Memon, B. Sankur, “Steganalysis Using Image Quality Metrics,” IEEE Transactions on Image Processing, 12, 221-229, (2003).

·        Avcıbaş, İ., N. Memon, B. Sankur, K. Sayood, “A Progressive Lossless/Near-Lossless Image Compression Algorithm,” IEEE Signal Processing Letters, 9, 312-314, (2002).

·        Avcıbaş İ., B. Sankur, K. Sayood, “Statistical Evaluation of Image Quality Measures,” Journal of Electronic Imaging, 11, 206-223, (2002).

 

Conference Publications

 

 

Conference Publications in Turkish

 

 

Member IEEE

 

Professional Service

Panelist for TÜBİTAK research projects and reviewer for:

IEEE Transactions on Image Processing,

IEEE Transactions on Multimedia,

IEEE Transactions on Information Forensics and Security,

IEEE Transactions on Circuits and Systems I

Signal Processing,

Pattern Recognition

Journal of Electronic Imaging

Computer Vision and Image Understanding,

Image and Vision Computing