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浏览/检索结果: 共6条，第1-6条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序作者升序作者降序提交时间升序提交时间降序题名升序题名降序 Improved algorithm of LED display image based on composed correction (EI CONFERENCE) 会议论文 International Conference on Advances in Computer Science, Environment, Ecoinformatics, and Education, CSEE 2011, August 21, 2011 - August 22, 2011, Wuhan, China Song X.-J.; Ma X.-Q.; Liu W.-Y.; Zheng X.-F. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 In order to enhance the display result of the LED display image  an improved algorithm of LED display image based on composed correction is proposed. Firstly  the correction principle and the development status of the current correction technologies of the LED display image is introduced  and the two main correction technologies are analyzed. Secondly  the theory of composed correction is proposed by constructing a mathematical model. Thirdly  this algorithm is achieved in VHDL which is one of hardware description language  and verified in an experimental platform. Experimental results show that this algorithm is able to enhance the display result of the LED display image significantly. 2011 Springer-Verlag Berlin Heidelberg.   Swarm robots task allocation based on local communication (EI CONFERENCE) 会议论文 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China Yongming Y.; Xihui C.; Qingjun L.; Yantao T. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 Task allocation is an essential strategy to achieve effective cooperation for swarm robots. Self-organized task allocation strategy is studied and efficient labor division and regulation is realized through local interactions among individual robots based on response threshold model. Local communication mechanism is proposed for the purpose of sharing local sensation information  and the simulation experiments verify that the efficiency of task allocation is improved significantly. 2010 IEEE.   Panoramic aerial camera image motion measurement using a hybrid system (EI CONFERENCE) 会议论文 2010 3rd IEEE International Conference on Computer Science and Information Technology, ICCSIT 2010, July 9, 2010 - July 11, 2010, Chengdu, China Li G.; Jia P. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 Image motion compensation is significantly important for aerial camera photograph. To execute the compensation  we must determine the image motion exactly. This paper proposes a method of real-time image motion measurement for panoramic aerial cameras based on image processing using a hybrid system. Two cameras are simultaneously used in the hybrid system. One main linear CCD for imaging  while the other auxiliary low resolution high frame rate area CCD for determining the image motion based on 2D spatial correlation. The demanding computational requirements for the real-time 2D spatial correlation are covered by a joint transform optical correlator. Simulation test results show that the accuracy is improved and the measurement error is within 0.2 pixels for input images with SNR=1 dB. 2010 IEEE.   Optical design of reflecting telescope with large field (EI CONFERENCE) 会议论文 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 19, 2008 - November 21, 2008, Chengdu, China Gong D.; Wang H.; Tian T.-Y.; Yuan J.-G. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 Reflecting telescopes have been widely used for many outstanding advantages. But the field of a common reflecting system is too small to meet the needs nowadays. When a correcting lens is inserted at the rear of R-C system  the off-axis image quality is significantly improved. After optimizing with CODE V optical design software  a new design scheme of reflecting telescope with large field of view is achieved. 2009 SPIE.   Compression of remote sensing image based on Listless Zerotree Coding and DPCM (EI CONFERENCE) 会议论文 ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China Chen S.-L.; Huang L.-Q. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 The data quantity of remote sensing image is very large. Furthermore  the lowest frequency subband contains the main energy of original image and reflects the coarse of original image after remote sensing image is transformed by wavelet  so it is very important to the reconstructed image. Therefore a hybrid image compression method based on Listless Zerotree Coding (LZC) and DPCM is presented  namely  the lowest frequency subband is compressed by DPCM and others are compressed by LZC. LZC is a kind of zerotree coding algorithm for hardware implementation  which is based on SPIHT and substitutes two significant bit maps for three lists in SPIHT algorithm. Thereby LZC significantly reduces the memory requirement and complexity during encoding and decoding procedure. But LZC doesn't recognize the significance of grandchild sets  so the PSNR values of LZC are lower than SPIHT's and the compression speed drops. It is improved by adding a significant bit map that recognizes the significance of grandchild sets. A comparison reveals that the PSNR results of the hybrid compression method are 2 dB higher than those of LZC  and the compression speed is also improved.   Chapter 2. STRUCTURE AND TRANSFORMATION OF THE LABOUR FORCE 专著章节/文集论文 出自: Off-farm employment in the Hengduan Mountain region of Sichuan province, China, Beijing, Beijing:China Science & Techonloy Press, China Science & Techonloy Press, 1992, 页码: 40-60 作者:  Wang Fei 收藏  |  浏览/下载：17/0  |  提交时间：2015/05/29 improved significantly  provincial population  off-farm employmen  improved significantly  provincial population  off-farm employmen