Digital watermarking technology is increasingly used to protect copyright and demonstrate ownership of digital multimedia (such as text, music, photos, videos). In order safeguard intellectual property rights rules for multimedia, this project suggests a text watermark algorithm. The process hiding little or grayscale images the main focus, though. masking in high-color high-density area block ...

This thesis presents a new multiple-valued encoder with re-configurable radix. The proposed circuits utilize serial cyclic D/A conversion and semi floatinggate (SFG) inverters for compact design and a high functional capacity per device. A re-configurable radix is not supported by existing SFG inverter based multiple-valued encoders which make use of parallel binary weight D/A conversion. The s...

We propose that the giant HI ring recently discovered by HIPASS for S0 galaxy NGC 1533 is formed by unequal-mass merging between gas-rich LSB (low surface brightness: “ghost”) galaxies and HSB disks. The NGC 1533 progenitor HSB spiral is transformed into a barred S0 during merging and the outer HI gas disk of the LSB is transformed into the giant HI ring. We also discuss two different possibili...

Steganography is the process of embedding data into a media form such as image, voice, and video. The major methods used for data hiding are the frequency domain and the spatial domain. In the frequency domain, the secret data bits are inserted into the coefficients of the image pixel's frequency representation such as Discrete Cosine Transform (DCT) , Discrete Fourier Transform (DFT) and Discr...

We use a model of galaxy disk formation to explore the metallicities, dust content, and neutral-gas mass density of damped Lyman-α (DLyα) absorbers. We find that the [Zn/H] abundance measurements of DLyα systems now available can be reproduced either by a population of low surface brightness (LSB) galaxies forming at redshifts z > 3, whose chemical contents evolve slowly with time and whose sta...

Beenish Siddiqui1, Sudhir Goswami 3 1Student, Department of CSE, M.tech, Meerut Institute of Engg. & Technology, Uttar Pradesh, India. 2Associate Professor, Department of CSE, Meerut Institute of Engg & Technology, Uttar Pradesh, India. ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract: Informatio...

We presentUBV I surface photometry of a sample of low surface brightness (LSB) disk galaxies. LSB disk galaxies are fairly well described as exponential disks with no preferred value for either scale length, central surface brightness, or rotational velocity. Indeed, the distribution of scale lengths is indistinguishable from that of high surface brightness spirals, indicating that dynamically ...