ICTACT Journal on Image and Video Processing

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Semi-Fragile Blind Watermarking Mechanism for Color Image Authentication and Tampering


Affiliations
1 Department of Computer Science, Sutex Bank College of Computer Applications and Science, India
2 Department of Computer Science, G.H. Patel P.G. Department of Computer Science and Technology, India
     

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Digital Image watermarking data hiding technique is proposed in paper to provide authentication to color image. It has capability of tamper detection and tamper localization. The suggested system is blind watermarking system which doesn’t require original information at destination. The system is robust against non-malicious attacks where as fragile with malicious attacks. The watermark is generated based on content of original image and it is embedded using IWT and QIM techniques. To the destination place for authentication purpose, embedded watermark is extracted. For classification of image, extracted and generated watermark from watermarked image are compared and based on this differential information, tampering is analyzed. The image is classified as authentic or tampered as per clustering of pixels within differential information. If image is declared as tampered then tampered region is identified using clustering detail. The PSNR is achieved up to 43.57dB and NCC is near to 1. As per numbers of parameters concern and as per experiments, it is found that proposed system is the improved version of existing systems.

Keywords

Image Watermarking, Image Authentication, Tamper Detection, Tamper Localization, Color Image.
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  • Semi-Fragile Blind Watermarking Mechanism for Color Image Authentication and Tampering

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Authors

Hiral A. Patel
Department of Computer Science, Sutex Bank College of Computer Applications and Science, India
Dipti B. Shah
Department of Computer Science, G.H. Patel P.G. Department of Computer Science and Technology, India

Abstract


Digital Image watermarking data hiding technique is proposed in paper to provide authentication to color image. It has capability of tamper detection and tamper localization. The suggested system is blind watermarking system which doesn’t require original information at destination. The system is robust against non-malicious attacks where as fragile with malicious attacks. The watermark is generated based on content of original image and it is embedded using IWT and QIM techniques. To the destination place for authentication purpose, embedded watermark is extracted. For classification of image, extracted and generated watermark from watermarked image are compared and based on this differential information, tampering is analyzed. The image is classified as authentic or tampered as per clustering of pixels within differential information. If image is declared as tampered then tampered region is identified using clustering detail. The PSNR is achieved up to 43.57dB and NCC is near to 1. As per numbers of parameters concern and as per experiments, it is found that proposed system is the improved version of existing systems.

Keywords


Image Watermarking, Image Authentication, Tamper Detection, Tamper Localization, Color Image.

References