In mammalian rods and cones, light activation of the visual pigments leads to release of the chromophore, which is then recycled through a multistep enzymatic pathway, referred to as the visual or retinoid cycle. In invertebrates such as Drosophila, a visual cycle was thought not to exist since the rhodopsins are bistable photopigments, which consist of a chromophore that normally stays bound t...

In this paper, based on two-dimensional difference histogram modification, a novel reversible data hiding (RDH)scheme is proposed by using binary space partition technique. The existing method data hiding is done by using difference pair-mapping and the data hiding aims to embed secret message into cover image. It is a natural extension of expansion embedding and shifting techniques used in cur...

Recently, more and more attention is paid to reversible data hiding (RDH) in encrypted images, since it maintains the excellent property that the original cover can be losslessly recovered after embedded data is extracted while protecting the image content’s confidentiality. All previous methods embed data by reversibly vacating room from the encrypted images, which may be subject to some error...

Pixel value ordering and prediction error expansion (PVO+PEE) is a very successful reversible data hiding (RDH) scheme. A series of studies were proposed to improve the performance PVO-based However, embedding capacity those schemes quite limited. We propose two-step prediction-error-triplet RDH scheme based on PVO. three-dimensional state transition map for prediction-error triplet also guide ...

Introduction: Robotic right donor hepatectomy (RDH) has been described recently as an alternative to open (ODH). Experienced centres have demonstrated shorter hospital stay compared in this study, we the quality of life (QOL) between RDH and ODH at three months following surgery. Methods: A total 154 consecutive hepatectomies (open robotic) were recruited. The SF-36 questionnaire was used asses...

© 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 761 REVERSIBLE DATA HIDING BY HISTOGRAM MODIFICATION FOR IMAGE CONTRAST ENHANCEMENT Silpa Rajan1, Minu Lalitha Madhavu2 1Silpa Rajan, Pursuing Mtech at Sree Buddha college of Engineering , Pattoor, Kerala, India 2Minu Lalitha Madhavu , Assistant Professor , Dept. of Computer Science Engineering, Sree Buddha Colle...

In reversible data hiding (RDH), the original cover can be losslessly restored after the embedded information is extracted. A famous author Kalker and Willems established a rate–distortion model for RDH, in which they proved out the rate–distortion bound and proposed a recursive code construction. In previous concept, improved the recursive construction to approach the rate – distortion bound B...

Benjamin W. Chaffee, DDS, MPH, PhD; Jing Cheng, MD, MS, Elizabeth T. Couch, RDH, MS; Kristin S. Hoeft, Bonnie Halpern-Felsher, PhD

Reversible data hiding in encrypted domain(RDH-ED) can not only protect the privacy of 3D mesh models and embed additional data, but also recover original extract losslessly. However, due to insufficient use model topology, existing methods have achieved satisfactory results terms embedding capacity. To further improve capacity, a RDH-ED method is proposed based on topology models, which divide...

In this paper, reversible data-hiding (RDH) systems with modified fluctuation functions and rate-matched Reed–Solomon (RS) codes are proposed to enhance the data recovery from encrypted images. The modified fluctuation functions are used for estimating embedded codeword bits from the correlation of pixels. Instead of direct data-bit embedding, codeword bits of RS codes are embedded by a data-hi...