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A Camera Image Authentication Using Image Information Copyright Signature for Mobile Device without Distortion  

Han, Chan-Ho (강원대학교)
Moon, Kwang-Seok (부경대학교)
Publication Information
Journal of the Institute of Convergence Signal Processing / v.15, no.2, 2014 , pp. 30-36 More about this Journal
Abstract
Quality and resolution of camera in mobile device is improved significantly. In this paper, we propose block-based information hide techniques without image distortion for mobile device to solve image degradation in conventional watermarking methods. Information of image is composed with text such as camera maker, model, date, time, etc. Each text is converted to $8{\times}8$ pixel blocks and is added to the bottom of image. Generally image including block based information for image authentication are compressed using JPEG in mobile device. The vertical line value in JPEG header is modified by original size of image sensor. This technique can hide the block based authentication information using general decoder. In the experimental results, JPEG file size is slightly increased within 0.1% for the proposed block based authentication information encoding. Finally proposed methods can be adopted for various embedded systems using medical image, smart phone and DSLR camera.
Keywords
Image Authentication; Image Information Copyright Signature; $8{\times}8$ Block Based Information; JPEG Exif File Format; Mobile Device;
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