大屏幕_融合_拼接显示系统解决方案(7.10)

大屏幕显示系统设计方案-1-大屏幕融合显示系统技术方案大屏幕显示系统设计方案-2-1.前言······························································································································32.与单屏大屏幕相比，边缘融合大屏幕的优势···········································································43.项目概述·························································································································54.设计依据·························································································································54.1通用投影显示设计依据·····································································································54.2边缘融合特殊设计要求·····································································································54.3系统设备选型依据···········································································································64.4用户需求························································································································65.设计方案·························································································································75.1系统结构图····················································································································75.2大屏幕显示系统技术条件与产品选型：···············································································85.2.1该技术实现的大屏幕具有如下优势：············································································85.2.2本系统的设备组成及各部分作用如下：·········································································95.2.3系统功能·················································································································95.2.4设备选择和介绍········································································································9a.投影机······················································································································9b.投影机支架和调整机构······························································································10c.屏幕的选购：···········································································································10d.边缘融合和图像处理设备····························································································11大屏幕显示系统设计方案-3-1.前言随着科技的不断发展，可视化技术的日新月异，大屏幕显示系统应用越来越广泛，成功应用到政府、军队、企事业单位等等各行各业。人们对大屏幕显示的精度、清晰度、色彩还原度等技术指标的要求，也是越来越高，单个的大屏幕显示系统，有时候很难满足复杂环境的应用要求，因此，更高技术的显示系统，大屏幕拼接系统应运而生。大屏幕拼接技术在提升整幅画面分辨率、整幅画面亮度，放大部分画面显示方面，都有着无可比拟的优越性。传统大屏幕拼接系统：是由多台投影机投射单独画面，物理拼接而成整体大画面，每个投影画面之间没有内容的重叠部分，即使采用整张无缝的屏幕，在视觉上也会感觉到拼接缝的存在。（见下图1）没有任何割裂感觉的整幅画面总是带给人们完美的视觉享受，靓丽的画面更带来美妙的视觉冲击，因此，边缘融合大屏幕拼接系统也就应运而生。边缘融合大屏幕拼接系统：是指整幅投影画面由不同的投影机投射画面拼接组成，每个单独的投影画面拼接中有着投影光线和画面内容的重叠部分，通过软硬件的结合处理，消除光线重合部分的多余亮度，从而确保整幅画面上面没有任何接缝，亮度均匀一致，给观众完美的视觉冲击。（见下图2）图1图2从上图可以看到，边缘融合大屏幕拼接系统的显示效果显然有优势。大屏幕显示系统设计方案-4-2.与单屏大屏幕相比，边缘融合大屏幕的优势增加图像尺寸；画面的完整性多台投影机拼接投射出来的画面一定比单台投影机投射出来的画面尺寸更大；鲜艳靓丽的画面，能带给人们不同凡响的视觉冲击，采用无缝边缘融合技术拼接而成的画面，要很大程度上保证了画面的完美性和色彩的一致性。增加分辨率每台投影机投射整幅图像的一部分，这样展现出的图像分辨率被提高了。比如，一台投影机的物理分辨率是1024×768，融合带为160个像素点后，三台融合后图像的分辨率就变成了2752×768。超高分辨率同利用带有多通道高分辨率输出的图像处理器和计算机，可以产生每通道为1024x768像素的两个或更多通道的合成图像。如果融合160像素，可以通过减去多余的交叠像素产生的2752×768分辨率图像。目前市场上还没有可在如此高的分辨率下操作的独立显示器。其解决办法为使用投影机矩阵，每个投影机都以其最大分辨率运行，合成后的分辨率是减去交叠区域像素后的总和。缩短投影距离增加画面层次感由于采用了边缘融合技术，画面的分辨率、亮度得到增强，同时配合高质量的投影屏幕，就可使得整个显示系统的画面层次感和表现力明显增强。在融合拼接中，由于采用融合处理技术，消除了光学缝隙，这样和普通硬拼接系统相比，在技术水平和显示效果上，就有了质的差异和提高，从而使显示的图像完全一致，无光学分割，保证了显示图像的完整性和美观性。这在显示地图、图纸等图像信息时，更为重要，因为在图纸、地图上存在大量的线条或路线等，而屏幕缝隙和光学缝隙就会造成图像显示污染，容易使观察人员把显示的图像线条和拼接系统本身的线条误为一体，从而导致决策和研究失误。而通过融合处理，就可以避免出现这种情况。大屏幕显示系统设计方案-5-在融合拼接系统中，所有图像都经过融合处理器进行了校正和统一，这样在大屏幕上进行图像显示和切换时，无论切换什么格式的图像，整个屏幕的亮度、色彩、鲜艳度、均匀度都比较一致，不会出现传统拼接系统中经常出现的由于信号更换而导致系统显示质量的变化。在融合拼接系统中，由于在处理器中对投影显示图像进行了处理，可以对不同投影信号间的色差、亮差、均匀度进行调整，这也使得该系统显示的图像质量优于传统拼接系统。边缘融合图像处理器除了具有边缘融合和图像多画面处理功能外，还具有图像存储和调用功能，可以把本身存储的高分辨率图像直接作为大屏幕系统的背景进行显示，这在实际使用中非常有实用价值。3.项目概述本项目是一个监控视频显示系统，采用了3通道边缘融合显示系统，配合先进的纯硬件图形处理技术，向管理者展示更加逼真的展示图像4.设计依据4.1通用投影显示设计依据4.1.1影响图像质量的因素人对图像质量的感觉是由许多相关因素结合起来决定的，尽管在显示系统中人们最重视的是亮度，但其它因素也严重影响着人们对图像的感觉。这些因素有对比度和分辨率，对比度决定了系统的动态范围，分辨率决定了系统显示细节的能力。对比度对比度是经常被强调的，因为它对图像质量影响很大。低的对比度意味着系统低的黑电平水平，这意味着没有能力显示“暗”及“黑”，你看到的是像洗过一样的图像或者在图像上比较暗的部位看不清细节。分辨率分辨率是指数字系统中水平和垂直的像素，像素越多，意味着图像有更多的细节，这也可称之为图像的空间频率，细节部位具有更高的空间频率。亮度、对比度、分辨率交互影响图像的质量。看清细节的能力主要受亮度和对比度影响。4.2边缘融合特殊设计要求融合区的宽窄直接影响整幅画面的亮度和色彩均匀性，因此，融合区重合尺寸一般在6%到8%左右。屏幕要保证其视觉上的“无缝”感，平整度高，均匀性好。应选择宽视角、低增益的屏幕，以使获得较宽的整体水平和垂直观看视角，大大降低融合区的重合感。投影机的选择应考虑其亮度和色彩均匀性、边缘几何特性。大屏幕显示系统设计方案-6-融合控制器的融合区范围可调整，具有对重合带的亮度和色彩羽化处理功能。融合控制器能接收多路输入信号，信号可以窗口的方式显示，在整屏上任意漫游。4.3系统设备选型依据对于方案的构思、系统的设计、器材的选型，我们经过了严谨的筛选，确保系统能达到以下的优点：先进性：我们从高起点高标准设计，确保系统在未来一定时期内保持先进；同时也要考虑到技术适用性，即实用程度。科学性：我们确保系统的设计从用户的使用功能出发，在满足各项使用功能的前提下，系统做到简洁、不夸张；在系统设备选型上充分考虑其扩展能力。可靠性：系统运行安全可靠。追求先进性的同时考虑新技术的风险以及技术的成熟性。4.4用户需求1.屏幕尺寸：2.4米×8.4米2.幕布：正投硬幕，增益不高于1.0，3.分辨率：融合后，单一逻辑屏幕物理分辨率不低于3072×768象素；灯泡亮度恒定；4.亮度：5200流明的光输出。5.单台投影仪分辨率：1024×768最大支持分辨率1600×1200；大屏幕显示系统设计方案-7-5.设计方案5.1系统结构图根据上述设计依据，我们推荐采用一行一列水平方向边缘融合正投拼接方案。示意如下：大屏幕显示系统设计方案-8-大屏幕显示系统：投影有效高度2.4米，宽7.2米，3台投影机5.2大屏幕显示系统技术条件与产品选型：1．考虑到系统的稳定性，图像处理设备及边缘融合器采用全硬件构架技术，无CPU和操作系统，不需要操作系统支持，上电即可