中国科学院机构知识库网格系统: 检索

Algorithm of image enhancement based on order morphology transformation (EI CONFERENCE) 会议论文 OAI收割
2009 International Forum on Information Technology and Applications, IFITA 2009, May 15, 2009 - May 17, 2009, Chengdu, China
作者: Liu Y.; Liu Y.; Liu Y.

收藏 | 浏览/下载：14/0 | 提交时间：2013/03/25

A method based Tsallis entropy and order morphology transform for gray image enhancement is proposed in this article. The order morphology transform method improves the evaluation guide of transform and chose the percentile value and structure B value by the Maximum Tsallis entropy of the area where the coefficient q is 0.8 enhances the gray image. Experiments show that the method enhances the image contrast and suppressing noise and extracting edge. The histogram and gray value show that the image contrast is improved. 2009 IEEE.

An image matching algorithm based on sub-block coding (EI CONFERENCE) 会议论文 OAI收割
2nd International Workshop on Computer Science and Engineering, WCSE 2009, October 28, 2009 - October 30, 2009, Qingdao, China
作者: Li S.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

In order to improve the speed of matching algorithm and simplify the processing of existing sub-block coding matching a new template matching method combined local gray value encoding matching and phase correlation is proposed. Matching process is divided into rough matching and fine matching. Rough matching divides the image into certain size blocks called R-block sums the gray value of each R-block pixel encodes the R-block according to the gray value distribution of R-block with the adjacent R-block and matches by step between the template and each search sub-image. Then fine matching results are obtained using phase correlation according to initial match parameters. The time complexity of the proposed method is (M2) .The new algorithm is faster than traditional algorithm by two orders of magnitude and the speed has improved twice compared with existing sub-block coding method. Experiments demonstrate that the new algorithm is robust to the linear transformation of pixel grey value and image noise and it also has the stability of small-angle rotation. 2009 IEEE.

Multiresolution animated models generation based on deformation distance analysis (EI CONFERENCE) 会议论文 OAI收割
2009 International Conference on Computer Modeling and Simulation, ICCMS 2009, February 20, 2009 - February 22, 2009, Macau, China
Shixue Z.; Enhua W.

收藏 | 浏览/下载：61/0 | 提交时间：2013/03/25

In computer graphics animated models have been widely used to represent time-varying data. Reducing the models complexly is a common way to overcome the rendering limitations. In this paper 2009 IEEE. we propose an efficient method for generating multiresolution animated models based on deformation distance analysis. Our method obtains different LOD models by performing iterative edge contraction operations. We use deformation distance to analysis the deformation degree of the triangle planes during the whole animation and define a deformation weight to be added to the aggregated edge contraction cost. Thus features in areas with large deformation can be preserved well. Besides we propose a mesh optimization method for dynamic model sequence which can efficiently improve the temporal coherence and reduce visual artifacts between adjacent frames. The results show our approach is efficient easy to implement and good quality animated approximations with well-preserved fine details can be generated at any given frame. copy

Blind channel estimation of MIMO-OFDM based on FDPM (EI CONFERENCE) 会议论文 OAI收割
5th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2009, September 24, 2009 - September 26, 2009, Beijing, China
Gang W.; Ming Z.; Hua C.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

Subspace based methods have been widely discussed in multichannel estimation including MIMO-OFDM system. However direct subspace methods suffer from heavy computation complexity y of O(N3). In this paper a new subspace tracking technique called Fast Data Projection Method (FDPM) is proposed for adaptively tracking the noise subspace. The new algorithm has low complexity of O(NL) and is the only numerically stable low complexity algorithm for tracking subspaces corresponding to the smallest singular values. Simulation results show that the proposed scheme has similar performance to the original. 2009 IEEE.

Graph fitting test method for the interpolation error of Moire fringe (EI CONFERENCE) 会议论文 OAI收割
9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China
作者: Sun Y.; Sun Y.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

DirectShow application in LED panel display system (EI CONFERENCE) 会议论文 OAI收割
2009 International Conference on Information Technology and Computer Science, ITCS 2009, July 25, 2009 - July 26, 2009, Kiev, Ukraine
Tao L.; Ding T.-F.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

A new DirectShow application in the field of LED Panel display system is shown in this paper. It realizes video processing functions with DirectShow architecture on computer. Source Filter and many Transform Filters which provided by Microsoft Co. transform source video into RGB24 format. Then the video data are scaled up/down to LED panel resolution by Fixformat Filter which inherite CTramsformfilter baseclass. After that the R/G/B values of video data are adjusted in CCorrect Filter to adapt LED Panel display. Finally the processed video is shown on LED Wall through DVI or VGA interface. Our experimental results demonstrate that this system makes a good performance. It is greatly simplify the functions of Sending-Board Receiving Board and Control-Scanning-Board in display system of the LED Wall. The total cost will be cut down observably if we can transplant the filters into the embedded platform to build a special video processing system for LED Panel display. 2009 IEEE.

Real-time restoration for motion-blurred color images by multichannel combination processing (EI CONFERENCE) 会议论文 OAI收割
1st International Workshop on Education Technology and Computer Science, ETCS 2009, March 7, 2009 - March 8, 2009, Wuhan, Hubei, China
作者: Sun H.; Sun H.; Li S.

收藏 | 浏览/下载：46/0 | 提交时间：2013/03/25

A fast algorithm is proposed to restore the color images degraded in a deterministic way by motion- blurred by multichannel combination processing. Based on the color space conversion model the point spread functions of the image motion on each plane of YUV422 image can be achieved. The U V plane of YUV422 images are combined to form a new UV plane which has the same size as Y plane. Then the Y UV plane are packed into a two dimensional complex array which can be transformed directly by FFT and result a composite frequency spectrum. Wiener filter is applied to filter Y UV spectrums separated from the composite spectra. On Graphics Processing Unit (GPU) platform the proposed algorithm can restore a 1024x1024 24-bit motion-blurred color image in 7.95ms and the PSNR of the restored image is 27.12 which reveals a good restoration performance. 2009 IEEE.

Real-time adjusting of yaw angle of space camera based on General Image-Quality Equation (EI CONFERENCE) 会议论文 OAI收割
2009 2nd International Conference on Intelligent Computing Technology and Automation, ICICTA 2009, October 10, 2009 - October 11, 2009, Changsha, Hunan, China
作者: Wang J.; He X.; Xu S.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

A Strategy of Real-Time Adjusting of Yaw Angle (SRTAYA) of space camera was proposed base on General Image-Quality Equation (GIQE). During space camera imaging yaw angle which is caused by rotation of the earth and the gesture changing of satellite impacts integral aspect of TDI (Time Delay and Integration) CCD (Charge Couple Device) so that the image quality degrades. For extending imaging time of space camera and enhancing image quality yaw angle must be adjusted. The descending value of GIQE reflects the degrading quantity of image quality. The SRTAYA calculated an acceptable augmenting value of yaw angle according with a specific value of GIQE which the degrading of image quality can't be neglected no longer. The example which actualized a practical orbit of satellite illuminated that the SRTAYA could limit the value of yaw angle less than 318.45". 2009 IEEE.

A dynamic data mining model for engineering management (EI CONFERENCE) 会议论文 OAI收割
2009 Second ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2009, August 8, 2009 - August 9, 2009, Sanya, China
Zhu J.-W.; Tang Y.-G.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

Data mining has become increasingly critical for the success of companies in this emerging era of Engineering Management. As Engineering Management activities increasingly shift to the web the challenge facing corporate management is maintaining competitive advantage by building strong relations with employees customers and suppliers and partners. A good data mining strategy can help achieve this goal. Unfortunately many companies use data mining technologies that do not suit today's new information era. This paper addresses the definitions about data mining area of data mining development of data mining then provide an summary of the driving and impeding forces that help and hinder proper deployment of data mining strategies in Engineering Management. Finally the paper advocates the strategy of data mining for Engineering Management. 2009 IEEE.

Influence of a general small inclination of two gratings on the moire fringe (EI CONFERENCE) 会议论文 OAI收割
CLEO/Pacific Rim 2009 - 8th Pacific Rim Conference on Lasers and Electro-Optics, August 30, 2009 - September 3, 2009, Shanghai, China
Cai S.; Qiao Y.-F.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

The effect of a general small inclination between the two grating planes on the period of the moire fringes under illumination with a plane wave is studied. 2009 IEEE.