王波
Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Main positions:Professor
Gender:Male
Alma Mater:Dalian University of Technology
Degree:Doctoral Degree
School/Department:School of Information and Communication Engineering
Discipline:Signal and Information Processing
Business Address:A512, Haishan Building
Contact Information:bowang@dlut.edu.cn
E-Mail:bowang@dlut.edu.cn
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Indexed by:会议论文
Date of Publication:2013-02-05
Included Journals:EI、CPCI-S、Scopus
Volume:8665
Key Words:image forensics; image tampering location; JPEG artifacts; non-aligned double JPEG compression
Abstract:In this paper, we present an efficient method to locate the forged parts in a tampered JPEG image. The forged region usually undergoes a different JPEG compression with the background region in JPEG image forgeries. When a JPEG image is cropped to another host JPEG image and resaved in JPEG format, the JPEG block grid of the tampered region often mismatches the JPEG block grid of the host image with a certain shift. This phenomenon is called non-aligned double JPEG compression (NA-DJPEG). In this paper, we identify different JPEG compression forms by estimating the shift of NA-DJPEG compression. Our shift estimating approach is based on the percentage of non zeros of JPEG coefficients in different situations. Compared to previous work, our tampering location method (i) performances better when dealing with small image size, (ii) is robust to common tampering processing such as resizing, rotating, blurring and so on, (iii) doesn't need an image dataset to train a machine learning based classifier or to get a proper threshold.
I am not a star professor, but I am working on the road to a star professor of tomorrow. For this reason, self-motivated graduate students are desired to my research group. Self-motivated attitude and initiative are the most important characteristics in our laboratory. Students with preliminary knowledge on signal (image/video) processing and programming skills are most welcome. For your academic trip in my group, I will devote myself to training your FIVE abilities: Intellectual skills, Communication skills, Personality characteristics, Habit of work, Mechanical skills, which are considered as the most important abilities of a graduated student.
http://ice.dlut.edu.cn/WangBo/index.html
