最新刊期
卷 2 ， 期 11 ， 1997
- 摘要：This paper describes a m QAM method suitable for high speed digital HDTV transmission.Both Gray code logic of coding/decoding and constellation for 64QAM are given.The characteristics of m QAM are analyzed and the computer simulation for studing the transmission properties has been carried out.关键词：Digital image transmission;Multi level quadrature amplitude modulation;Gray code;Power spectrum density;Error code rate2379|112|0更新时间：2024-05-08
- 摘要：A new mothod-called Octopus for color images segmentation which is robust,rapid and free of tuning parameters is presented in this paper. It acquires this properties by the synergy of seeded region growing, Snake(Active Contour Models) and Operator of the computer. The process of objects extraction starts with a SRG. The region boundary are modified by Snake on the basis of considering the boundary smoothness and variation of image gradient along the boungary. We illustrate the properties of Octopus on real image where the color information of the object are used.2473|123|0更新时间：2024-05-08
- 摘要：Due to the 3 components representation of a color image, it's essential that we should not only take into account the spatial and structural redundancies,but also fully exploit the spectral correlations present in color image data. In this paper, we present a 3D DCT algorithm for the compression coding of color image, which is based on 3D matrix model. All the color image components are jointly transform compressed and the redundancies are effectively reduced. Simulation results demonstrate good quality reproduction and high compression ratio of this method, which is also simple and convenient.3329|133|0更新时间：2024-05-08
- 摘要：A method for approximation of image block is presented, based on a least squares fractal approximation by a Self Affine System。The computational cost is only equal to 2×M×N products and 4×M×N additions。The code of image block consists of the quantized fractal cofficients。This block coding of images is called as block fractal approximation code (BFAC)。Its compression ratio depends on the size of image block and quantization of fractal cofficients。BFAC for "Lena" image by 8×8 blocks is quantized to six bits and encodes to a comp ression ratio of 17.8:1, its encoding and decoding time is about 30 seconds in PC486?D X33。A f ter eight iterations of decoding, the reconstructive image look like the origin。Its greater speed and simplicity compared to other fractal transforms suggest its immediate applicability。2037|134|0更新时间：2024-05-08
- 摘要：Based on the generalized morphological open closing and close opening operations, a class of new morphological filters are defined using multiple structuring elements and adaptive weighted averaging technique in this paper. They can not only efficiently suppress noise in the image but also preserve the geometrical features of the image. These filters possess calculation simplicity and easy to be real time processed in parallel.关键词：mathematical morphology;Morphological filter;Structuring element;adaptive filtering2652|138|0更新时间：2024-05-08
- 摘要：A new technique to extract the 3D vision information of conicoids robustly from their gray level image is successfully developed in this paper.The closed mapping relationship between the 3 D position and attitude of a conicoid and its image contour is explicitly derived.The relationship can be applied to efficiently determining the position and attitude of a concoid from the conics robustly extracted from the gray level image by means of the technique mentioned in .The experiments have demonstrated that the technique is fast, efficient and robust.2470|106|0更新时间：2024-05-08
- 摘要：This paper discusses the basic theory of electrical capacitance tomograph.A neural network method for electrical capacitance tomography is proposed.A neural network model for image reconstrution and its realization are studied.Experimental results illustrate that the method is effective and accurate for image reconstruction.关键词：Capacitance tomography;BP network;Image reconstruction;Sample2122|115|0更新时间：2024-05-08
- 摘要：The research on parameters of grassland Remote Sensing analysis,grassland classification system, proposal classification principal,grassland classification quota,and discernment mapping are discussed in this paper. Thereafter,the analysis methods about main elements effecting grassland resource accounting are also introduced. Finally,a demonstration of grassland resource accounting is given.关键词：Grassland resource;Image mapping;Resource accounting;Geo sciences analysis2133|130|0更新时间：2024-05-08
- 摘要：This paper introduces the technology of multimedia monitor TV (MMTV) in design, which overcomes the shortage of PC monitor`s poor displaying moving pictures and still image, and also it tries to solve the problem of low definition and trembling pictures of TV in displaying text file .The technology makes it possible for the large screen size, high definition, high quality display of moving pictures and text file. Using DAC auto control of auto input signals and under the control of wave clipper circuit, the stability of high voltage generator circuit and deflection circuit is ensured,which,to the maximum,solves the technical contradiction between contrast and high definition of complex video display circuit. Moreover, this paper also provides a new structure design in fission combination style, a better choice for family theater in future.2450|134|0更新时间：2024-05-08
- Postal code：100190
- Tel：010-58887035/58887030/58887418 Email：jig@aircas.ac.cn
- Technical support is provided by Beijing Founder electronics co., LTD 京ICP备05080539号-4
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
0