【作者】 薛敬明；

【导师】 李峰；

【作者基本信息】 长沙理工大学 ， 计算机应用技术， 2010， 硕士

【摘要】 无缝拼接系统是对多媒体进行大范围、高分辨率显示的一种有效实现方式。它所带来的超大画面、多屏显示以及清晰逼真的显示效果使得监控、安防、会议、模拟仿真等领域的工作效率得到大幅改善,同时促进了这些行业技术水平的快速进步。国外已有无缝拼接的产品面世,但为了保证技术的保密性,对于开发商所采用的融合函数以及相关处理的报道极少。针对现有简单的线性函数不便于实时调整参数,本文首先修正现有简单的线性函数关系,引入非线性的融合函数,即通过附加参数p、a修正现有的边缘融合算法并用Gamma算子对亮度像素做进一步校正。针对边缘融合处理所产生的光带效应,本文在进行边缘融合的处理过程中,对重叠像素做淡入淡出处理,将子图中位于边缘重叠区的每个像素都乘以融合函数,从而使得当它被叠加到另一幅字图像中、与其相对应的像素叠加的时候,能得到期望的像素值。鉴于像素信号和亮度之间还应满足Gamma关系,故在处理过程中进行了Gamma校正的设计。并考虑到在投影过程不同投影仪会造成的颜色失真问题,本文还对颜色/亮度输出匹配做了一定的处理。同时,考虑到投影机投影到特殊的投影屏幕时所引起了几何失真,本文还引入了几何校正技术,用于解决图像几何失真情况。最后,本文利用所开发数字灯投影拼接系统对多种类型的图像进行模拟测试,将图像质量与传统的算法进行一定的比对,采用多种评价指标,比如像素扭曲度指标、空间连续度指标以及信噪比作为客观评价函数,基于多个角度对不同参数的边缘融合效果进行评价和比对,验证了数字灯投影拼接系统的有效性和实用性。并依据边缘融合概念以及几何校正技术设计了一个可实现软边无缝拼接的数字灯投影系统。更多还原

【Abstract】 Seamless system for a wide range of multimedia, high-resolution display of an effective implementation. It brings the large screen, more vivid screen display and clear display makes monitoring, security, conference, simulation and other fields have greatly improved work efficiency, while promoting the rapid progress of industry technical standards. Seamless products abroad have been available, but in order to ensure the confidentiality of technology for the integration of functions used by developers and the related reports of minimal processing.Simple linear function for the current time is not easy to adjust the parameters, this paper amend existing simple linear function, the integration of the introduction of non-linear function, namely, by additional parameters, to amend the existing edge of fusion algorithm with Gamma Operators further correction of the pixel brightness. Against the edge of the light generated by fusion band effect, the edge during this integration process, the pairs of overlapping pixels do fade processing at the edge of the graph in the overlapping area of each pixel is multiplied by the integration of functions, allowing as It is also a word superimposed image, superimposed with the corresponding pixel when the pixel value can be expected.View of the pixel brightness signal and the relationship between the Gamma should meet, it was in the process design of Gamma Correction. Taking into account the different projectors in the projection process will cause the color distortion problem, the effect of color / brightness output matching to do some processing. At the same time, taking into account the special projectors to the projection screen projection arising from the geometric distortion, the paper also introduces the geometric correction techniques for solving geometric distortion.Finally, this paper developed by the digital light projection system on various types of mosaic image simulation test, the image quality and the traditional method for some of the comparison, Cai Yong multiple evaluation indexes, such as pixel Niuqu degree index, spatial index continuous degree Yi Ji signal to noise ratio as an objective evaluation function, based on various perspectives on the edge of fusion effect of different parameters to evaluate and to verify the validity of the digital lighting projection splicing system is effective and practical. This article based on the concept of edge integration and geometric correction technology designed to achieve a seamless soft-edge digital light projection system.更多还原