最新刊期
卷 1 ， 期 1 ， 1996
- 摘要：In this paper we construct two types of dyadic wavelets suiting for edge detection and description: one is zero-symmetrical,the other is zero -antisymmetrical. These results have enriched the theory of dyadic wavelet and laid a solid foundation for properly applying dyadic wavelet to edge detection and description. Then the application of dyadic wavelet to edge detection, classification and description are studied from computation theory and algorithm aspects. Experimental results are also given to show the effectiveness.2902|76|0更新时间：2024-05-08
-
- 摘要：One of the main difference between atmospheric effect on nadir and off-nadir observations is the adjacency effect. For nadir remote sensing,the adjacency effect is azimuthally isotropic, but in off-nadir remote sensing,the effect is azimuthally dependent and the contribution of the background in the direction of the observer is greater than others. In this paper,we consider the space composed by the sensor,the target pixel, and environmental pixel and use geometric relations to describe the single scattering of diffuse reflection from the environmental one toward the sensor,in order to get a first-order aproximation of the atmospheric PSF for off-nadir observation. Our approximation is compared with Monte Carlo simulation results. Then we design a Wiener filter to remove the adjacency effect on ASAS images. The correction results are evaluated by visual evaluation of image quality and the analysis of spatial correlation between pixels in the original,corrected offnadir and nadir images.3595|78|0更新时间：2024-05-08
- 摘要：In this Paper, an improved Snake (Active Contour Models)is Presented and used for the purpose of feature extraction from aerial imagery. Feature extraction is formulated using dynamic programming as an optimized problem-solving Experimental results are presented to demonstrate the efficiency of the algorithm.2648|67|0更新时间：2024-05-08
- 摘要：Ray casting is a useful volume rendering method for visualizing irregular data this method can produc high quality images. However, It is quite time-consuming due to the intensive intersection calculation between rays and cell facets, especially the exterior cell facets. In order to speed up the intersection, computation, an improved method is proposed in the paper by taking the advantages of polygon scan conversion algorithm for the exterior cell facets, and of geometric coherence for the interior cell facets.关键词：intersection;Polygon scan conversion;ray casting;Irregular data;volume rendering2493|57|0更新时间：2024-05-08
- 摘要：In this paper we discuss the effect of error due to the digital representation of image such as chain code error and sampling error on the coefficient of fourier discriptor, and we compare the performance of some normalization methods. This method is applied to the three dimensional aircraft recognition.关键词：Preprocessing;Normalization;Fourier descriptor2303|59|0更新时间：2024-05-08
- 摘要：The restoration of 3-D vision information about underwater targets is the key problem for an Autonomous Under water Vehical (AUV) to sense envirronmental information and perform autonomous tasks. This paper presents a model-based restoration method. This method makes the curve fitting based on the detected edge points of targets and restores the .3D information of targets using the model knowledge. The method has been employed, successfully, for the guidance of an AUV in its autonomous underwater operations.关键词：D vision;AUV;Vision Guidance;Object recog nition;Image processing2369|54|0更新时间：2024-05-08
- 摘要：This paper focuses on some mathematical problems in computer art. Computer art is different from general art works, for its digital structure so mathematical models and methods play important roles in both theoretical and practical research. This paper provides a general description of some practical techniques,such as geometric modeling, mathematical transformation,iterative scheme, animation and so on. Finally, the mathematical description about aesthetic criterion is also introduced.2471|69|0更新时间：2024-05-08
-
- 摘要：Dataguest claims that videoconferencing grew 350% in the last five years,and industry analysts predict that during the next few years it will have a compound growth rate of 35%. At this rate of growth,information and telecommunications managers will be expected to add and manage quickly and efficiently a large number of lines,people,and equipment. Understanding some of the current and emerging standards is critical in designing the proper structure to implement this new environment and is also essential in managing investment in proliferating equipment. This paper describes features, benifits and the occasional drawback of international standards, H. 320,T. 120, MPEG - 1, MPEG - 2 and JPEG.关键词：Digifal video network;Standards2145|61|0更新时间：2024-05-08
- 摘要：Few technologies in the industry have moved so far in so littil time as computer graphics. Since the release of Windows 3. 0 in early 1990s, the graphics market has been growing at a dazzling speed. The fierce competition makes the technology evolving so fast that it results in generations of product within only five years. This paper gives a detailed review of the exciting technological advances in PC graphics field over the past few years, and discusses the latest 3D technoloties and products emerged at Comdex 95. The purpose of this article is to provide readers with a technical guideline of the rapid changing graphics industry.2157|46|0更新时间：2024-05-08
- 摘要：A general introduction of the characteristics and relationship of image engineering and its three layers: image processing, image analysis and image understanding is presented in this paper. Considering the current status of the researches on image engineering and the applications of image techniques as well as the distribution of related publications in China,we selected nearly hundred references from several important Chinese journals published in 1995 and classified these references into different categories according to their contents. The results provide readers with not only a general and up-to-date overview of image engineering in China,but also a convenient means of literature searching for image techniques.关键词：Image engineering;Image processing;Image analysis;Image understanding3217|85|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