【摘要】：在現(xiàn)有的嵌入式圖形系統(tǒng)中,圖形顯示占據(jù)著越來越重要的地位。特別是在一些特殊的嵌入式圖形系統(tǒng)中,如飛機(jī)座艙顯示畫面,飛機(jī)在飛行中的姿態(tài)比較復(fù)雜,為了能夠?qū)崟r(shí)反映飛機(jī)姿態(tài),所以要求飛機(jī)座艙內(nèi)的圖形顯示器的圖形畫面能夠動(dòng)態(tài)、實(shí)時(shí)、平滑和清晰的進(jìn)行顯示。顯示畫面的質(zhì)量與字符發(fā)生器的硬件結(jié)構(gòu)和圖形生成算法有關(guān)。由于機(jī)載液晶顯示器在顯示旋轉(zhuǎn)的字符、刻度線時(shí)會(huì)因?yàn)楣鈻棚@示器的分辨率限制從而存在圖形的鋸齒狀的走樣現(xiàn)象,嚴(yán)重的走樣現(xiàn)象將影響飛行員對(duì)飛機(jī)姿態(tài)的判斷,從而造成飛行隱患甚至飛行事故。根據(jù)國(guó)內(nèi)外座艙顯示技術(shù)、OpenGL技術(shù)的發(fā)展及圖形反走樣算法的現(xiàn)狀,本文選擇VxWorks嵌入式操作系統(tǒng)作為硬件的操作系統(tǒng),應(yīng)用圖形反走樣算法設(shè)計(jì)出滿足座艙顯示系統(tǒng)的圖形畫面。本文所取得成果包括以下幾個(gè)方面： 通過對(duì)多種反走樣方法進(jìn)行研究和比較,在原有的Bresenham直線生成算法上進(jìn)行改進(jìn),采用多像素繪制直線,有效的避免了原有Bresenham直線生成算法的出現(xiàn)的鋸齒現(xiàn)象。在基于VC++平臺(tái)上編制使用反走樣算法圖形繪制程序,對(duì)反走樣算法使用前后程序生成的圖形進(jìn)行比較,使用反走樣算法生成的圖形基本解決了原有圖形繪制過程中明顯的圖形走樣問題,圖形中的鋸齒現(xiàn)象明顯減弱,同時(shí)驗(yàn)證了改進(jìn)的Bresenham直線反走樣算法和字符反走樣算法的可行性和有效性。 為了驗(yàn)證改進(jìn)的Bresenham直線反走樣算法和字符反走樣算法在硬件系統(tǒng)的可移植性,本文選擇通用的MPC8245評(píng)估板作為字符圖形發(fā)生器的硬件系統(tǒng),結(jié)合嵌入式操作系統(tǒng)VxWorks完成了反走樣算法在PowerPC硬件平臺(tái)上的仿真測(cè)試和算法移植,使用OpenGL標(biāo)準(zhǔn)圖形庫繪制圖形,圖形顯示效果良好。
[Abstract]:Graphic display plays a more and more important role in the embedded graphics system. Especially in some special embedded graphics systems, such as aircraft cockpit display screen, the attitude of aircraft in flight is more complex, in order to reflect the attitude of aircraft in real time, Therefore, the graphics display in aircraft cockpit can be dynamic, real-time, smooth and clear display. The quality of the display screen is related to the hardware structure of the character generator and the graphics generation algorithm. Because airborne LCD displays rotated characters and the scale line is limited by the resolution of the grating display, there is a zigzag aliasing phenomenon of the graphics. The serious aliasing phenomenon will affect the pilots' judgment of the aircraft attitude. Thus causes the flight hidden danger and even the flight accident. According to the development of cockpit display technology and the current situation of graphic anti-aliasing algorithm at home and abroad, this paper chooses VxWorks embedded operating system as the hardware operating system, and designs a graphic picture to satisfy the cockpit display system by using the graphic anti-aliasing algorithm. The results obtained in this paper include the following aspects: through the research and comparison of various anti-aliasing methods, the original Bresenham line generation algorithm is improved, and the lines are drawn with multi-pixels. It effectively avoids the sawtooth phenomenon of the original Bresenham line generation algorithm. Based on VC platform, the graphics drawing program using anti-aliasing algorithm is compiled, and the graphics generated by the anti-aliasing algorithm before and after the use of the anti-aliasing algorithm are compared. The figure generated by the anti-aliasing algorithm basically solves the obvious problem of figure aliasing in the original drawing process, and the sawtooth phenomenon in the graph is obviously weakened. At the same time, the feasibility and effectiveness of the improved Bresenham line aliasing algorithm and character antialiasing algorithm are verified. In order to verify the portability of the improved Bresenham linear anti-aliasing algorithm and the character anti-aliasing algorithm in the hardware system, this paper chooses the universal MPC8245 evaluation board as the hardware system of the character graph generator. The simulation test and algorithm transplantation of anti-aliasing algorithm on PowerPC hardware platform are completed with the embedded operating system VxWorks. The graphics are drawn by using OpenGL standard graphics library, and the graphic display effect is good.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TP391.41;TP368.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 杜曉鵬;魏延巖;;直線反走樣快速繪制技術(shù)[J];電光與控制;2010年12期

2 劉紅喜;李長(zhǎng)江;孫俊喜;;基于DSP的圖像采集及處理系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)[J];電子技術(shù)應(yīng)用;2009年02期

3 璩柏青,文建明,李增忠;一種基于像素相關(guān)性的自適應(yīng)反走樣算法[J];電子科技;2004年03期

4 羅鈞;侯艷;付麗;;一種改進(jìn)的灰度矩亞像素邊緣檢測(cè)算法[J];重慶大學(xué)學(xué)報(bào);2008年05期

5 趙耀宏;史澤林;羅海波;裴立力;韓國(guó)瑞;;自適應(yīng)紅外圖像直方圖均衡增強(qiáng)算法[J];光電工程;2008年03期

6 王宇平;;光柵顯示圖形中直線反走樣技術(shù)算法的改進(jìn)[J];哈爾濱理工大學(xué)學(xué)報(bào);2008年03期

7 牛玉靜;唐棣;;雙步圓的反走樣生成算法[J];計(jì)算機(jī)工程與應(yīng)用;2010年23期

8 姚恒;魏為民;唐振軍;;重采樣圖像的盲檢測(cè)技術(shù)[J];計(jì)算機(jī)工程與應(yīng)用;2010年30期

9 王麗青;陳正陽;陳樹強(qiáng);陳學(xué)工;;一個(gè)改進(jìn)的簡(jiǎn)單多邊形凸包算法[J];計(jì)算機(jī)工程;2007年03期

10 宋春林;馮瑞;金煒;郭愛煌;;改進(jìn)的多分辨率SPIHT算法[J];計(jì)算機(jī)工程;2008年04期

，

本文編號(hào)：2194953