In Wyner-Ziv (WZ) video coding, or coding of video with decoder side information (SI), the correlation between the source and its SI at the decoder side is modeled as a virtual correlation channel, and decoding of the quantized source requires the estimation of the correlation channel parameter. In this paper, we present a joint decoding and correlation channel parameter estimation approach. In...

The study of rotary steering drilling technology is currently one of the hot topics in the drilling engineering field. It requires accurate well trajectory control instructions when rotary steerable tools are applied to achieve the well trajectory control goal. A drilling trajectory prediction model will benefit this progress. According to the continuous beam theory, a mechanical model of push-...

A new combinatorial characterization of a gray-tone image called Euler Vector is proposed. Euler number of a binary image is a well-known topological feature, which remains invariant under translation, rotation, scaling, and rubber-sheet transformation of the image. Euler vector comprises of a 4-tuple, where each element is an integer representing the Euler number of the partial binary image fo...

JPEG-2000, the successor to JPEG, is emerging as an attractive candidate for the future de facto image compression standard. However, while it offers superior results over most other image compression techniques, it comes with a long list of features and options, and consequently a highly complex algorithm. We have developed an image coder that can compete with the performance of JPEG-2000 whil...

We present a new algorithm for compressing surfaces created from oriented points, sampled using a laser range scanner or created from polygonal surfaces. We first use the input data to build an octree whose nodes contain planes that are constructed as the least square fit of the data within that node. Then, given an error threshold, we prune this octree to remove redundant data while avoiding t...

A new method for data hiding in grayscale images based on a human vision model with distortion-minimizing capabilities is proposed for covert communication. Each of the eight bit planes of an input grayscale image is viewed as a binary image, into which message data are embedded horizontally. To minimize the image distortion, two optimization techniques, namely, block pattern coding and dynamic...

Multi-context FPGAs have multiple memory bits per configuration bit forming configuration planes for fast switching between contexts. Large amount of memory causes significant overhead in area and power consumption. This paper presents two key technologies. The first is a floating-gate-MOS functional pass gate that merges storage and switching functions area-efficiently. The second is the use o...

This article will describe an optical encryption technical of images which it is proposed in an analogical and digital way. The development of the technical to a digital level, it is made to implementing algorithms (routines) in MATLAB. We will propose a functional diagram to the described analogical development from which designated the optical systems associated with each functional block. Le...

Recent image compression schemes have focused primarily on wavelet transforms, culminating in the JPEG-2000 standard. Block based DCT compression, on which the older JPEG standard is based, has been largely neglected because wavelet based coding methods appear to offer better image quality. This paper presents a simple compression algorithm that uses arithmetic coding on the bit-planes of the D...