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现代投影机技术发展探讨 被引量:1
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作者 钟艳花 《电脑知识与技术》 2010年第7X期6049-6050,共2页
该文介绍现代投影机的三种显示技术实现,即CRT投影技术、LCD投影技和DLP投影技术。对投影机的主要技术指标如面板技术、使用光源、应用领域等方面进行了介绍。
关键词 投影 大屏幕拼接系统 投影机技术
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投影机市场剧变前夕
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作者 向农 《微电脑世界》 2003年第21期38-39,共2页
如果我们处在2005年,就会发现投影机市场显得成熟了那么一些,市场格局渐趋明朗,产品的价格与服务也日见规范,人们已开始习惯这样一种状况。而很多业界人士在追溯这种变化的滥觞时,则不约而同地回想起了2003年10月21日NEC与神州数码的一... 如果我们处在2005年,就会发现投影机市场显得成熟了那么一些,市场格局渐趋明朗,产品的价格与服务也日见规范,人们已开始习惯这样一种状况。而很多业界人士在追溯这种变化的滥觞时,则不约而同地回想起了2003年10月21日NEC与神州数码的一次合作。 展开更多
关键词 投影市场 NEC公司 神州数码公司 公司合作 IT业 投影机技术 品牌代理
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New multi-camera calibration algorithm based on 1D objects
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作者 Zi-jian ZHAO Yun-cai LIU 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第6期799-806,共8页
A new calibration algorithm for multi-camera systems using 1D calibration objects is proposed. The algorithm inte- grates the rank-4 factorization with Zhang (2004)'s method. The intrinsic parameters as well as th... A new calibration algorithm for multi-camera systems using 1D calibration objects is proposed. The algorithm inte- grates the rank-4 factorization with Zhang (2004)'s method. The intrinsic parameters as well as the extrinsic parameters are re- covered by capturing with cameras the 1D object's rotations around a fixed point. The algorithm is based on factorization of the scaled measurement matrix, the projective depth of which is estimated in an analytical equation instead of a recursive form. For more than three points on a 1D object, the approach of our algorithm is to extend the scaled measurement matrix. The obtained parameters are finally refined through the maximum likelihood inference. Simulations and experiments with real images verify that the proposed technique achieves a good trade-off between the intrinsic and extrinsic camera parameters. 展开更多
关键词 Multi-camera calibration HOMOGRAPHY FACTORIZATION Scaled measurement matrix Projective depth
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A WEIGHTED ITERATIVE METHOD FOR ROBUST SELF-CALIBRATION
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作者 Liu Shigang Wu Chengke Tang Li Jia Jing 《Journal of Electronics(China)》 2006年第5期713-717,共5页
A robust self-calibration method is presented, which can efficiently discard the outliers based on a Weighted Iteration Method (WIM). The method is an iterative process in which the projective reconstruction is obtain... A robust self-calibration method is presented, which can efficiently discard the outliers based on a Weighted Iteration Method (WIM). The method is an iterative process in which the projective reconstruction is obtained based on the weights of all the points, whereas the weights are defined in inverse proportion to the re- ciprocal of the re-projective errors. The weights of outliers trend to zero after several iterations, and the accu- rate projective reconstruction is determined. The location of the absolute conic and the camera intrinsic pa- rameters are obtained after the projective reconstruction. The theory and experiments with both simulate and real data demonstrate that the proposed method is very efficient and robust. 展开更多
关键词 Weight iteration Self calibration Projective reconstruction
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