Title :
Comprehensive image index and detection of tampering in a digital image
Author :
Mall, Vinod ; Shukla, Satyavati ; Mitra, Sanjit ; Roy, Anil K.
Author_Institution :
Dhirubhai Ambani Inst. of Inf. & Commun. Technol., Gandhinagar, India
Abstract :
Integrity of digital image is of prime importance in areas relating to police investigation, evidence in the court, medical science and biometric images. With easy availability of image editing software and large volume of digital images in daily life, detection of image tampering has become a serious challenge for image processing community. Image content based hash function for authenticating an image is being widely used. In this paper we define Comprehensive Image Index that tells about the type of tampering done in a digital image. Most of the existing hashing technique extract one feature of the image and develop a single index hash function for image tampering detection. Proposed technique uses a new 3-tupled comprehensive image index which incorporates indices corresponding to structural tampering, brightness level adjustment and contrast manipulation. This technique is found to be robust against content preserving manipulations at the same time it is sensitive to malicious tampering.
Keywords :
brightness; cryptography; data integrity; image processing; 3-tupled comprehensive image index; brightness level adjustment; content preserving manipulations; contrast manipulation; digital image integrity; digital image tampering detection; hashing technique; image authentication; image content based hash function; image feature extraction; image processing; malicious tampering sensitivity; single index hash function; structural tampering; Brightness; Correlation; Detectors; Image edge detection; Indexes; Robustness; Vectors; Content Preserving Manipulation; Digital Watermarking; Hash function; Image Tampering; Similarity Value; Tampering Localization;
Conference_Titel :
Informatics, Electronics & Vision (ICIEV), 2013 International Conference on
Conference_Location :
Dhaka
Print_ISBN :
978-1-4799-0397-9
DOI :
10.1109/ICIEV.2013.6572704