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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林啟萬(Chii-Wann Lin) | |
dc.contributor.author | Szu-Yao Fu | en |
dc.contributor.author | 傅思堯 | zh_TW |
dc.date.accessioned | 2021-06-15T05:53:12Z | - |
dc.date.available | 2014-08-22 | |
dc.date.copyright | 2011-08-22 | |
dc.date.issued | 2011 | |
dc.date.submitted | 2011-08-18 | |
dc.identifier.citation | [1] E. Peli and T. Peli, ‘‘Image enhancement for the visually impaired,’’
Opt. Eng. 23, 47–51 (1984). [2] Goldstein, ‘‘Sensation&Perception’’,5th edition,1999. [3] Brain,Foundation of Vision, 1994. [4] Tamer Peli, ‘‘Adaptive filtering for Image enhancement ,’’ Opt. Eng. (1982). [5] V. Virsu, R. Nasanen, and K. Osmoviita, ‘‘The cortical magnification and peripheral vision,’’ J. Opt. Soc. Am. A 4, 1568–1578 (1987). [6] Peli et al. Vol. 21, No. 6/June 2004/J. Opt. Soc. Am. A 949 17. G. Westheimer, ‘‘The spatial grain of the perifoveal visual field,’’ Vision Res. 22, 157–162 (1982). [7] P. J. Bennett and M. S. Banks, ‘‘Sensitivity loss in oddsymmetric mechanisms and phase anomalies in peripheral vision,’’ Nature 326, 873–876 (1987). [8] P. J. Bennett and M. S. Banks, ‘‘The effects of contrast, spatial scale, and orientation on foveal and peripheral phase discrimination,’’ Vision Res. 31, 1759–1786 (1991). [9] C. M. E. Stephenson, A. J. Knapp, and O. J. Braddick, ‘‘Discrimination of spatial phase shows a qualitative difference between foveal and peripheral processing,’’ Vision Res. 31, 11315–11326 (1991). [10] M. C. Morrone and D. C. Burr, ‘‘Discrimination of spatial phase in central and peripheral vision,’’ Vision Res. 29, 433–445 (1989). [11] R. F. Hess and A. Hayes, ‘‘The coding of spatial position by the human visual system: effects of spatial scale and retinal eccentricity,’’ Vision Res. 34, 625–643 (1994). [12] Eli Peli and Jeonghoon Kim and Yitzhak Yitzhaky and Robert B. Goldstein and Russell L. Woods, ‘‘Wideband enhancement of television images for people with visual impairments,’’ Vol. 21, No. 6/June 2004/J. Opt. Soc [13] D. C. Burr, M. C. Morrone, and D. Spinelli, “Evidence for edge and bar detectors in human vision,” Vis. Res., vol. 29, no. 4, pp. 419–431, Apr. 1989. [14] Eli Peli, “Feature Detection Algorithm Based on a Visual System Model,”2002 [15] E. Ros, J. Diaz, S. Mota, F. Vargas-Martin, and M.D. Pelaez-Coca, “Real Time Image Processing on a Portable Aid Devicefor Low Vision Patients ,”2006 [17] 視覺資訊系統(一)- 視覺細胞的「計算」功能 http://campus2.chgsh.chc.edu.tw/science/content/1988/00030219/0006.htm [18] 視覺資訊系統(二) - 視覺細胞的計算生理 http://campus2.chgsh.chc.edu.tw/science/content/1988/00030219/0007.htm [19] 林鑫志, “弱視者電子閱讀輔助系統 – 針對HVS特性之可適性影像強化處 理,”臺灣大學醫工所論文2001 [21] 林啟明, “弱視者電子閱讀輔助系統 –利用小波轉換之影像強化處理,” 臺灣大 學醫工所論文2002 [22] 李吉民, “以FPGA實現即時影像處理於弱視輔具之研發,” 陽明大學醫工所論 文2008 [23] 謝易振, “弱視輔具之研發,” 陽明大學醫工所論文2007 [24] 俞能方, “視覺障礙者視力評估與影像強化補償,” 陽明大學醫工所論文2001 [25] 維基百科- YCbCr http://zh.wikipedia.org/wiki/YCbCr [26] 維基百科- LabView http://zh.wikipedia.org/wiki/LabVIEW | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/47275 | - |
dc.description.abstract | 視覺是人體中敏感的感覺器官之一,低視能者由於視覺上的限制,會造成生活機能與品質的降低。本研究為低視能患者提供一數位視覺影像輔助系統,藉由影像處理方式強化影像以增加患者對影像的辨識能力。影像強化方法以彩色影像中的明亮度色座標為主要強化影像,並將影像之塊狀與邊界特徵做強化,並將演算法延伸至同步彩色視訊影像處理以及同步AVI影片影像處理。接著為了驗證影像增強後對視覺補償的效果,本研究先以請十位受測者佩戴低視能模擬眼鏡並判斷所見圖形以及影片的方式進行驗證,接著再直接實際對十位弱視患者進行實驗。實驗結果顯示,我們可依低視能者視力退化程度對應影像強化參數,低視能者視力之退化程度是以科學化方式來分析視覺系統作了解,並藉由量測對比敏感函數(CSF)來得知視力系統衰退程度,並利用數值分析歸納出此強化演算法確實對低視能者有實質的影像資訊輔助,而結論告訴我們,大部分套用此輔助系統之影像對弱視患者都有相當程度的清晰度提升,但也會有少部分的人認為強化後的圖片有點失真的問題,細部特徵太過突兀,這將會是之後可繼續探討之問題。 | zh_TW |
dc.description.abstract | Human vision is one of the sensitive sensory organ, therefore, the visual constraints will reduced the quality of life for low vision patients. The goal of this thesis is to provide a digital system enhancement for low vision, and we use image processing methods to increase the ability for patients to recognize the image. The method of algorithm which we enhance the bar and edge feature, which represent the medium and the high information, and we also mediate the parameters of feature component according to the measurement of contrast sensitivity function(CSF) of low visions. Besides, we use the algorithm to finish a real time color camera and AVI video processing system. In order to verify the effect of image enhancement for visual compensation, we invite ten people to wear low vision simulation glasses and ten low vision old people. The result showed that subjects have significant improvement to determine enhanced images, it shows that this algorithm indeed to achieve effective information quality improvement for low vision patients. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T05:53:12Z (GMT). No. of bitstreams: 1 ntu-100-R98548004-1.pdf: 3987901 bytes, checksum: b80a9fabb203f9454ce7ee1a03e91508 (MD5) Previous issue date: 2011 | en |
dc.description.tableofcontents | 口試委員會審定書 #
誌謝 i 中文摘要 ii ABSTRACT iii CONTENTS iv LIST OF FIGURES vii Chapter 1 緒論 1 1.1 前言 1 1.2 研究動機 1 1.3 研究流程 2 1.4 論文架構 2 Chapter 2 理論相關研究 3 2.1 弱視定義 3 2.2 人體視覺系統 5 2.3 對比敏感函數 12 2.4 文獻回顧 16 2.4.1 窄頻影像對比強化處理演算法 16 2.4.2 寬頻影像特徵強化處理演算法 19 Chapter 3 研究方法 21 3.1 演算法原理 21 3.1.1 第一步驟 22 3.1.2 第二步驟 25 3.1.3 第三步驟 26 3.1.4 第四步驟 27 3.1.5 第五步驟 28 3.2 演算法實現 29 Chapter 4 實驗流程 32 4.1 弱視模擬眼鏡 32 4.2 模擬臨床實驗設計與結果 32 4.2.1 實驗一 32 4.2.2 實驗二 34 4.2.3 實驗三 36 4.2.4 實驗四 37 4.2.5 實驗五 38 4.3 實際臨床實驗設計與結果 39 4.3.1 實驗對象 39 4.3.2 實驗方式 40 4.3.3 實驗數據 40 Chapter 5 結果討論與未來展望 44 5.1 演算法結果評估討論 44 5.2 模擬實驗結果評估討論 44 5.3 臨床實驗結果評估討論 45 5.4 未來展望 45 REFERENCE 46 | |
dc.language.iso | zh-TW | |
dc.title | 低視能者彩色視覺影像輔助系統之研發與分析 | zh_TW |
dc.title | Color image aid system for low vision | en |
dc.type | Thesis | |
dc.date.schoolyear | 99-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 蔡景耀(Ching-Yao Tsai),蕭子健(Tzu-Chien Hsiao) | |
dc.subject.keyword | 弱視輔具,影像強化,數位影像處理, | zh_TW |
dc.subject.keyword | Low Vision Aid,Image Enhancement,Digital Image Processing, | en |
dc.relation.page | 47 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2011-08-19 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 醫學工程學研究所 | zh_TW |
顯示於系所單位: | 醫學工程學研究所 |
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