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This paper presents a robust image watermarking scheme for embedding gray scale watermark into RGB color image. The presented method is based on discrete wavelet transform (DWT), singular value decomposition and chaotic system. DWT and SVD are separately applied on three color planes (R, G and B) of original color image and watermark image for embedding and extracting processes. DWT and SVD techniques...
Watermarking scheme is required to secure data to protect digital contents from unauthorized modifications. Image watermarking scheme can effectively be used in medical image processing to authenticate or investigate the integrity on medical images. In this paper, discrete wavelet transform (DWT) domain and chaotic system based medical image watermarking scheme has been proposed for hiding patient...
This paper presents a watermarking approach for recovering crime scene image when the crime scene image has been tampered, based on chaotic system and singular value decomposition (SVD). At first, authentication information has been embedded into the region of information (ROI) of the scrambled crime scene image. The authentication information has been generated by using logistic map, while the scrambled...
This paper presents a new histogram equalization technique, based on gradient and threshold values. The background pixels of the image are associated with low gradient intensities and the detailed pixels are associated with high gradient intensities. The threshold value is usually used for segmentation. In the proposed method, at first the image has been divided into two regions according to the ascending...
In this paper, a robust and secure dual stages digital image watermarking scheme is proposed for copy right protection in SVD domain. In order to provide high security, the proposed scheme used Logistic map to encrypt the primary watermark and Arnold's cat map to scramble the cover image. The proposed scheme also used singular value decomposition (SVD) technique to decompose the scrambled cover image,...
Chaotic maps improve the security level of watermarking scheme due to its complex characteristics. The security is required to prevent unauthorized modifications. In this paper, a highly security based watermarking scheme for image authentication has been proposed. The two dimensional Arnold's cat map, logistic map and 2D Game of Life cellular automata provide the security scheme. Arnold cat map has...
Image watermarking techniques are specially used to provide copyright protection, owner's identification, image authentication and tamper detection. Fragile watermarking is usually used for image authentication and tamper detection. In this paper, fragile watermarking scheme based on chaotic system has been proposed. Two dimensional Arnold's cat map has been used to improve the security of the proposed...
Now a days, image watermarking is becoming a very important issue for image authentication and copyright protection due to explosive growth of multimedia applications. In this paper, an innovative robust digital watermarking scheme is proposed for image authentication and copyright protection which is based on the probability of existing total number of one's and zero's in a single block. The proposed...
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