本文關(guān)鍵詞：利用3D快門眼鏡測量立體視銳度　出處：《吉林大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 立體視覺 快門眼鏡 水平視差 對比度 亮度

【摘要】：立體視覺是雙眼辨別物體深度、距離、凹凸的能力,是雙眼視覺完善的重要標(biāo)志。評估立體視覺采用的是立體視銳度,其大小是通過測量雙眼所能覺察的最小視差來確定,視差的閾值越小,表明立體視銳度越好。測量立體視銳度的傳統(tǒng)設(shè)備是Howard-Dolman立體視力測定儀,但此方法繁瑣,不適合常規(guī)應(yīng)用。常用的測量方式是基于偏振光鏡片或紅綠濾色片的立體圖檢測,這些方法測量方式雖然簡單,但存在精度差、易出現(xiàn)誤差、測量范圍有限等問題。本研究建立了基于3D快門眼鏡技術(shù)的計算機(jī)輔助立體視銳度測量系統(tǒng),進(jìn)行了以下三部分工作:(1)采用定距測量和變距測量兩種系統(tǒng),評估不同大小、形狀以及類型的視標(biāo)對立體視銳度測量結(jié)果的影響。(2)評估基于計算機(jī)顯示的立體視銳度測量的屏幕對比度容許范圍,判斷對比度大小對測量結(jié)果的影響。(3)探索環(huán)境亮度對計算機(jī)輔助立體視銳度測量的影響。受試者30名,年齡20-28歲。采用的設(shè)備包括3D筆記本(ASUS G750Y47JX)和3D快門眼鏡、激光測距儀、色彩校正儀、屏幕亮度計和照度計測量等。程序由C#語言編寫。本研究測試包括(1)在定距測量系統(tǒng)中,測試距離設(shè)定為4.1m,設(shè)計了36套測量方案,包含了三種形狀(“C”,“E”,“□”)、交叉和非交叉視差,以及代表0.5、0.4、0.3、0.2、0.1和0log MAR視力大小的視標(biāo)。變距測量系統(tǒng)中,采用包含三種形狀的交叉和非交叉立體視標(biāo)共6套方案。(2)采用變距測量系統(tǒng),對灰度對比度分別為100%,90%,80%,70%,60%,50%,40%,30%,24%,20%,18%,16%,14%,12%,10%,8%,6%,4%和2%的19張測試頁進(jìn)行測量。(3)采用變距測量系統(tǒng),分別在環(huán)境亮度不超過3lux,以及約150lux、800lux和10000lux的情況下進(jìn)行測試。所有數(shù)據(jù)經(jīng)PASW Statistic 18.0軟件處理。結(jié)果顯示:(1)定距測量系統(tǒng)中,受試者均完成了所有36套測試。采用Kruskal-Wallis test,各組間均未見統(tǒng)計學(xué)差異(Chi-square=29.844,P=0.715)。即視標(biāo)的大小(0.5到0 log MAR)、視標(biāo)的形狀(“C”,“E”,“□”),和視差的類型(交叉或非交叉)均不影響立體視銳度測量結(jié)果。變距測量系統(tǒng)研究發(fā)現(xiàn)視標(biāo)的形狀和類型均不影響立體視銳度測量結(jié)果。(2)19組灰度對比度間存在統(tǒng)計學(xué)差異(單因素方差分析,F=39.750,P0.001)。Bonferroni測驗顯示在前12個組間(灰度對比度100% 16%,實(shí)際對比度99.8%-36.4%)并無顯著差異。(3)環(huán)境亮度分析結(jié)果顯示,4個組的立體視銳度值并無顯著差異(單因素方差分析,F=0.773,P=0.512)采用3D快門眼鏡進(jìn)行立體視銳度的測量,方便而有效。視標(biāo)的大小、形狀,以及視差類型對于立體視覺測量并無顯著影響;圖像對比度和環(huán)境亮度對于正常狀態(tài)下的立體視銳度檢查也無顯著影響。3D筆記本立體視銳度測量系統(tǒng)因其便攜、靈活等特點(diǎn),將逐漸展現(xiàn)出其在臨床與科研中的應(yīng)用價值。
[Abstract]:Stereo vision is the ability of binocular vision to distinguish object depth, distance and concavity, which is an important sign of binocular visual perfection. Stereoscopic vision is evaluated by stereoscopic acuity. Its size is determined by measuring the minimum parallax that can be detected by both eyes, and the threshold of parallax is smaller. It shows that the better the stereoscopic acuity, the traditional equipment for measuring stereoscopic acuity is Howard-Dolman stereoscopic visual acuity meter, but this method is cumbersome. It is not suitable for conventional application. The commonly used measurement methods are based on stereoscopic detection of polarizing lenses or red and green filters. Although these methods are simple, they have poor accuracy and are prone to errors. Based on 3D shutter glasses, a computer-aided stereoscopic acuity measurement system is established. In this paper, the following three parts of work are carried out: one is to evaluate the different sizes by using the two systems of fixed distance measurement and variable distance measurement. Effect of shapes and types of visual markers on the results of stereoscopic acuity measurements.) evaluating the screen contrast allowable range of stereoscopic acuity measurements based on computer display. To determine the effect of contrast on the measurement results. (3) to explore the effect of ambient brightness on computer-aided stereoscopic acuity measurement. Ages 20-28. The equipment includes 3D notebook ASUS G750Y47JX) and 3D shutter glasses, laser rangefinder, and color corrector. The program is written by C # language. This research test includes 1) in the distance measurement system, the test distance is set to 4.1 m, and 36 sets of measurement schemes are designed. It contains three shapes ("C", "E", "-"), cross and non-cross parallax, and represents 0.5 / 0. 4 / 0.30.2. 0. 1 and 0. 1 log MAR visual acuity. In the variable distance measurement system, 6 sets of cross and non-cross stereoscopic markers including three shapes were adopted. The ratio of the gray levels is 100 and 90, respectively, and there are about 60, 50, 50, and 50, and 40, and 40, 30, 24, 24, and 20, 20, 20, 20, 20, 20, 20, 20, 20. 2% and 2% of the 19 test pages were measured using a variable distance measurement system, which did not exceed 3lux in ambient brightness, and about 150lux, respectively. In the case of 800lux and 10000lux, all the data were processed by PASW Statistic 18.0 software. All the subjects completed all 36 sets of tests. No statistical difference was found among the three groups using Kruskal-Wallis test (Chi-square 29.844). The size of the target is 0. 5 to 0 log mars, depending on the shape of the marker ("C", "E", "-"). The results of stereoscopic acuity measurement were not affected by the type of parallax (crossover or non-crossover). The study of variable distance measurement system found that the shape and type of visual marker did not affect the result of stereoscopic acuity measurement. There was statistical difference in gray contrast between 19 groups (single factor analysis of variance). The results of FN 39.750g P0.001U. Bonferroni test were found in the first 12 groups (gray contrast 100% and 16%). There was no significant difference in the actual contrast between 99.8- 36.4) the results of ambient luminance analysis showed that there was no significant difference in stereoscopic acuity of the four groups (single factor ANOVA). The 3D shutter glasses are used to measure the stereoscopic acuity, which is convenient and effective. Parallax type had no significant effect on stereoscopic vision measurement. Image contrast and ambient brightness have no significant effect on stereo acuity measurement under normal condition. 3D notebook stereo acuity measurement system is portable and flexible. It will gradually show its application value in clinical and scientific research.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：R770.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 陳洋;孫瑩;楊良;吳凡;姜喜超;劉姝;金晗;吳荒;;基于3D快門眼鏡的立體視銳度測量方法[J];中國實(shí)驗診斷學(xué);2015年08期

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本文編號：1436034