This paper introduces the architecture and initial algorithms for Pixel-planes 5, a heterogeneous multi-computer designed both for high-speed polygon and sphere rendering (1M Phong-shaded triangles/second) and for supporting algorithm and application research in interactive 3D graphics. Techniques are described for volume rendering at multiple frames per second, font generation directly from co...

In a color image every pixel value composed of red, green and blue component and each of which ranges from 0 to 255 in case of 8-bit representation. In this paper, we have used pixel value differencing (PVD) method for secret data embedding in each of the component of a pixel in a color image. But when we use pixel-value differencing (PVD) method as image steganographic scheme, the pixel values...

In this paper, we propose a dual-image based reversible data hiding scheme. Here, we divide a secret message into sub-stream of size n bits, where n − 1 bits are embedded using Pixel Value Differencing (PVD) and 1 bit is embedded using Difference Expansion (DE). We consider two consecutive pixels from cover image, calculate the difference between them and then embed n − 1 bits secret message by...

A new approach of image watermarking based on RSA encryption technique for the lossless medical images has been proposed. This paper presents a strategy of attaining maximum embedding capacity in an image in a way that to determine the amount of information to be added in each pixel, maximum possible neighboring pixels are analyzed for their frequencies. The technique provides a seamless insert...

Illumination-invariant image processing is an extension of the classical technique of homomorphic filtering using a logarithmic point transformation. In this paper, traditional approaches to illumination-invariant processing are briefly reviewed and then extended using newer image processing techniques. Relevant hardware considerations are also discussed including the number of bits per pixel r...

In this paper, we have proposed a new steganographic algorithm that is used to hide text file inside an image. In order to increase/ maximize the storage capacity we have used a compression algorithm that compresses the data to be embedded. The compression algorithm we have used works in a range of 1bit to 8 bits per pixel ratio. By applying this algorithm we have developed an application that ...

In this paper, we propose a new architectural technique to reduce energy dissipation of frame memory through adaptive bitwith compression. Unlike related approaches, the technique utilizes the fixed order of memory accesses and data correlation of video sequences by dynamically adjusting the memory bitwidth to the number of bits changed per pixel. Instead of treating data bits independently, we...

Algorithms that use optical system diversity to improve multiplexed image reconstruction from multiple low-resolution images are analyzed and demonstrated. Compared with systems using identical imagers, systems using additional lower-resolution imagers can have improved accuracy and computation. The diverse system is not sensitive to boundary conditions and can take full advantage of improvemen...

In recent years, reversible data hiding methods using dual stego images have been proposed extensively. In order to embed more secret data, we proposed a reversible data hiding method that can embed secret data into M stego images, where M ≥ 2. The pixel in M stego images can be used to embed N secret bits. The embedding capacity becomes greater as N and M increase, where N means the number of ...