Title :
Understanding geometric manipulations of images through bovw-based hashing
Author :
Battiato, S. ; Farinella, G.M. ; Messina, E. ; Puglisi, G.
Author_Institution :
Image Process. Lab., Univ. of Catania, Catania, Italy
Abstract :
The increasing use of low cost imaging devices and the innovations in terms of media distribution technologies induce a growing interest on technologies able to protect digital visual media against malicious manipulations of the visual contents. One of the main problems addressed in this research area is the blind detection of traces of forgery on an image obtained through the internet. Specifically, in this paper we consider the context of communications, where malicious image manipulations should be detected by a receiver. In the proposed method, an image hash based on the Bag of Visual Words paradigm is attached as signature to the image before trans mission. The forensic hash is then analyzed at destination to detect the geometric transformations which have been applied to the received image. This task is fundamental for further processing which usually assumes that the received image is aligned with the original one, as in the case of tampering detection systems. Experiments show that the proposed approach outperforms state-of-the art methods by obtaining a good margin in terms of performances.
Keywords :
Internet; computational geometry; cryptography; image coding; multimedia communication; object detection; BOVW-based hashing; Internet; bag of visual words paradigm; blind detection; digital visual media protection; forensic hash; geometric manipulations; image authentication; image hash; image validation; low cost imaging devices; malicious image manipulations; media distribution technologies; tampering detection systems; visual contents; Bag of Visual Word; Forensic hash; Geometric transformations; Image forensics; Image validation and authentication; Tampering;
Conference_Titel :
Multimedia and Expo (ICME), 2011 IEEE International Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-61284-348-3
Electronic_ISBN :
1945-7871
DOI :
10.1109/ICME.2011.6012160