發(fā)布時間：2018-06-03 04:22

  本文選題：機器視覺 + LED顯示屏測試�。� 參考：《哈爾濱工程大學(xué)》2007年碩士論文

【摘要】： 大屏幕顯示在商務(wù)會議、教學(xué)講座、廣告宣傳、工業(yè)監(jiān)控等方面都有廣泛的應(yīng)用。LED拼接顯示屏作為實現(xiàn)大屏幕顯示的一種方法也得到了廣泛的使用。近年來，隨著國內(nèi)外在LED材料和控制技術(shù)方面不斷踴躍出新的成果，LED顯示屏產(chǎn)業(yè)已發(fā)展成為新興的高科技產(chǎn)業(yè)。但是，在我國對LED顯示屏的質(zhì)量檢測在很大程度上仍然依靠人工來完成，使檢測速度和檢測質(zhì)量受個人主觀程度影響很大。 失控點數(shù)目、色度均勻性是評價LED顯示屏顯示質(zhì)量的兩個重要指標(biāo)。因此，本文的研究內(nèi)容主要圍繞著解決這兩個問題進行展開。把機器視覺技術(shù)融入到對全彩色LED顯示屏的檢測過程中，研發(fā)一種價格相對低廉的LED顯示屏智能化測試系統(tǒng)。 文章首先對LED顯示屏的發(fā)展概況進行了介紹，重點分析了LED顯示屏在生產(chǎn)、檢測和使用過程中存在的問題。然后對機器視覺系統(tǒng)的開發(fā)環(huán)境LabWindows/CVI進行簡單介紹，，并針對實際問題提出真彩色顯示模塊測試系統(tǒng)的硬件系統(tǒng)設(shè)計流程。再從色度學(xué)角度對顯示屏顏色均勻性進行了分析，并提出從三基色色品坐標(biāo)和白平衡兩個方面對LED顯示屏的顏色均勻性調(diào)整的方案。最后，運用圖像分割、圖像定位與標(biāo)記、圖像配準(zhǔn)等技術(shù)對顯示屏檢測軟件流程進行設(shè)計，給出了具體的設(shè)計流程并對實驗結(jié)果進行分析。實驗表明通過該系統(tǒng)可以實現(xiàn)對顯示屏指標(biāo)的快速檢測，并可以根據(jù)要求，在一定范圍內(nèi)對顯示屏的色彩保真度進行調(diào)整。
[Abstract]:Large screen display has been widely used in business conferences, teaching lectures, advertising, industrial monitoring and other aspects of the application of .LED splicing display screen as a way to achieve a large screen display has been widely used. In recent years, LED display screen industry has developed into a new high-tech industry with new achievements in materials and control technology at home and abroad. However, in our country, the quality testing of LED display screen still depends on manual to a large extent, so the speed and quality of detection are greatly affected by the subjective degree of individuals. The number of points out of control and chromaticity uniformity are two important indexes to evaluate the display quality of LED display screen. Therefore, this paper mainly focuses on solving these two problems. This paper introduces machine vision technology into the detection process of full-color LED display, and develops an intelligent testing system for LED display screen with relatively low price. In this paper, the development of LED display screen is introduced, and the problems existing in the production, detection and use of LED display screen are analyzed. Then the development environment of machine vision system, LabWindows/CVI, is briefly introduced, and the hardware system design flow of the real color display module test system is put forward in view of the practical problems. The color uniformity of the display screen is analyzed from the perspective of chromaticity, and the scheme of adjusting the color uniformity of the LED display screen from the coordinate of three primary colors and the white balance is put forward. Finally, image segmentation, image location and marking, image registration and other technologies are used to design the software flow of screen detection. The specific design flow is given and the experimental results are analyzed. The experimental results show that the system can quickly detect the display screen index and adjust the color fidelity of the display screen in a certain range according to the requirements.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2007
【分類號】：TN873;TP274

【引證文獻】

相關(guān)期刊論文 前1條

1 馮松;;基于AVR單片機LED顯示屏系統(tǒng)的設(shè)計與實現(xiàn)[J];信息安全與技術(shù);2010年10期

相關(guān)碩士學(xué)位論文 前1條

1 董文曉;基于CCD相機測量的LED顯示屏亮度和色度均勻性算法研究[D];西安電子科技大學(xué);2012年

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