圖像是一個傳遞訊息的重要管道，為了讓駕駛在行駛中能夠快速且正確的操作其需要的功能，一個良好汽車圖像能夠有效地幫助資訊的傳達，讓駕駛在第一眼看到的時候，就清楚地瞭解其所要表達的意義。為了因應複雜的駕車環境，近年來車用抬頭顯示器(Head-up display；HUD)盛行，可將車內資訊直接投射於前擋風玻璃上，讓駕駛能夠保持抬頭狀態隨時注意前方的突發狀況，避免因低頭查看駕駛資訊而造成分心。同樣的，抬頭顯示器上的資訊樣式呈現也相當重要，若圖像未能有效的傳遞資訊，很可能會造成駕駛的負擔。
先前研究中Anjani (2015)發展決策樹作為查明使用者難以辨識圖像的診斷工具，但是其決策樹尚未經過測試是否能夠被有效運用。為了要證明決策樹的可用性，本研究讓受測者進行汽車圖像的偏好測試實驗，針對測試結果進行訪談，了解受測者對於圖像的偏好原因，並針對Anjani (2015)決策規則進行檢視，將決策樹沒有邏輯性的部分重新修正，進一步將受測者對於汽車圖像的偏好及不偏好原因與決策規則進行比對，並試圖將汽車圖像放入決策樹中。研究證明修正過後的決策樹能夠有效地檢視使用者難以辨識圖像與不偏好圖像的原因，可作為往後設計者在設計圖像時的參考依據。
本研究進而將決策樹概念應用於抬頭顯示器的圖像設計上，透過林啟訓(2015) HUD圖像設計樣式之訪談結果，以相同的方式將HUD圖像的偏好及不偏好原因與決策規則進行比對，且嘗試將不同功能圖像放入決策樹中，本研究發現決策樹亦能應用於檢視HUD圖像難以辨識與使用者不偏好原因，但仍有資訊比例與配置等問題須特別注意。未來研究建議能夠發展HUD圖像在整體介面的決策樹，作為檢測HUD資訊的比例與配置之診斷工具。

Icon is an important method for conveying massage to let drivers operate the functions they need in car driving quickly and correctly. A good icon can convey information effectively, and let driver understand the meaning clearly at the first interaction. In todays’ complex driving environment the use of heads-up display can provide important information be projected directly on windshield. Since it can keep drivers' head up to attend the environment in front of the car while checking the display, it might minimize accident caused by the possible distraction. Similarly, icons design on the heads-up display is also very important, because if it fails to convey the intended information effectively, it will likely cause burden on driving. Anjani (2015) developed decision tree as diagnostic tool for drivers difficultly of identifying icons, but the decision tree has not yet been tested if it can be used effectively. In order to prove applicability of the decision tree, we conducted an experiment to make participants provide their preferences of car icons design. According to preference test results and interview, we could understand participants’ preference reasons of car icons. By checking the decision rules in Anjani (2015) research, we revised illogical part of decision tree. Further, we compared preference and non-preference reasons with the decision rules and tried to put the car icons into decision trees. This study showed the revised decision tree could be effectively used to check difficultly of identifying icons. We also used the decision tree to check icons design on the heads-up display, through Lin (2015) interview results of HUD icons design. Although the decision tree also could be a diagnostic tool for drivers difficultly of identifying HUD icons, but there still has ration and arrangement problems. So, we suggest developing a decision tree of HUD icons in the whole interface, which can be a diagnostic tool for ration and arrangement of HUD.

林啟訓，評估車用抬頭顯示器之呈現資訊及設計樣式，台灣科技大學，碩士論文，2015。
康台生，視覺、標誌符號與表徵，設計研究學報，創刊號，83，2007。
蔡朝旭，汽車抬頭顯示器，光學元件技術專輯，光電資訊，1994。
Anjani, Shabila. (2015). "The Evaluation of Car Icons Using a Decision Tree." (Masters), National Taiwan University of Science and Technology (NTUST), Taipei.
Campbell, J. L., Richman, J. B., Carney, C., & Lee, J. D. (2004). "In-Vehicle Display Icons and Other Information Elements Volume I: Guidlines." Virginia: Turner-Fairbank Highway Research Cente, US Department of Transportation, Federal Highway Administration.
Chi, C.-F., & Dewi, R. S. (2014). "Matching performance of vehicle icons in graphical and textual formats. Applied Ergonomics", 45(4), 904-916. doi: http://dx.doi.org/10.1016/j.apergo.2013.11.009
Chi, C. F., Tseng, L. K., & Jang, Y. (2012). "Pruning a decision tree for selecting computer-related assistive devices for people with disabilities." IEEE Trans Neural Syst Rehabil Eng, 20(4), 564-573. doi: 10.1109/tnsre.2012.2193419
Denzin, N. K., & Lincoln, Y. S. (1998). "The landscape of qualitative research: Theories and issues." Thousand Oaks, CA: Sage
Horton, W. (1994). The icon book. New York: John Wiley & Sons.
Horton, W. K. (1994). The ICON Book: Visual Symbols for Computer Systems and Documentation: John Wiley \\& Sons, Inc.
Hsieh, D.-Y. (2014). "The possible causes of misinterpretation for icons in vehicle." (Masters), National Taiwan University of Science and Technology, Taipei.
Huang, K.-C. (2008). "Effects of computer icons and figure/background area ratios and color combinations on visual search performance on an LCD monitor." Displays 29(3): 237-242.
Hung, Ming-Hui (2011). "A Study of the Driving Information Interface on Head-up Display" (Master Dissertation), Tatung University.
Kaneko, S., Ikemoto, H., & Kusui, Y. (1991, 8-11 Oct 1991). "Approach to designing easy-to-understand icons." Paper presented at the Visual Languages, 1991., Proceedings. 1991 IEEE Workshop on.
Lindberg, T., & Näsänen, R. (2003). "The effect of icon spacing and size on the speed of icon processing in the human visual system." Displays, 24(3), 111-120. doi: http://dx.doi.org/10.1016/S0141-9382(03)00035-0
Ling, J., & van Schaik, P. (2002). "The effect of text and background colour on visual search of Web pages." Displays, 23(5), 223-230. doi: http://dx.doi.org/10.1016/S0141-9382(02)00041-0
Marcus, A. (1984), "Baby Face: User Interface Design for Small Displays." ACM, p.18-23.
McDougall, S. J., de Bruijn, O., & Curry, M. B. (2000). "Exploring the effects of icon characteristics on user performance: the role of icon concreteness, complexity, and distinctiveness." J Exp Psychol Appl, 6(4), 291-306.
Michalski, R., Grobelny, J., & Karwowski, W. (2006). "The effects of graphical interface design characteristics on human–computer interaction task efficiency. " International Journal of Industrial Ergonomics, 36(11), 959-977. doi: http://dx.doi.org/10.1016/j.ergon.2006.06.013
Passini, S., Strazzari, F., & Borghi, A. (2008). "Icon-function relationship in toolbar icons. " Displays, 29(5), 521-525. doi: http://dx.doi.org/10.1016/j.displa.2008.07.001
Paivio, A. (2006). "Dual Coding Theory and Education." Paper presented at the Pathways to Literacy Achievement for High Poverty Children, Michigan.
Rieber, L. P., et al. (1996). "The role of meaning in interpreting graphical and textual feedback during a computer-based simulation." Computers & education 27(1): 45-58.
Sanders, M., & McCormick, E. (1993). "Human Factors In Engineering and Design: McGraw-Hill Education."
Silver, N. C. and C. C. Braun (1993). "Perceived readability of warning labels with varied font sizes and styles." Safety Science 16(5-6): 615-625.
Tretten, Phillip. (2011). "Information Design Solutions for Automotive Displays Focus on HUD." (Doctoral dissertation), Lulea University of Technology, .
Tversky, B. and K. Hemenway (1984). "Objects, parts, and categories." Journal of experimental psychology: General 113(2): 169.
Wickens, Christopher D., Lee, John D., Liu, Yili, & Becker, Sallie E. Fordon. (2013). "Engineering Psychology and Human Performance: Pearson Education."
Wuryandari, A. I., Gondokaryono, Y. S., & Widnyana, I. M. Y. (2013). "Design and Implementation of Driver Main Computer and Head Up Display on Smart Car." 4th International Conference on Electrical Engineering and Informatics (Iceei 2013), 11, 1041-1047.
Young, Stephen L., and Michael S. Wogalter. (1990). "Comprehension and memory of instruction manual warnings: Conspicuous print and pictorial icons." Human Factors: The Journal of the Human Factors and Ergonomics Society 32.6: 637-649.
Zwahlen, Helmut T., Adams, Charles C., & DeBald, David P. (1988). "Safety aspects of car touch panel controls in automobiles." Paper presented at the Vision in Vehicles II. Second International Conference on Vision in Vehicles, Nottingham , United Kingdom.