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URN etd-0117117-152944 Statistics This thesis had been viewed 457 times. Download 0 times. Author Che-Yuan Su Author's Email Address No Public. Department Industrial Design Year 2016 Semester 1 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 145 Title Effects of Displays and Objects on Distance Perception in Real and Virtual Environments Keyword 3D Visual Effects Perception Distance Distance Perception Virtual Environment Virtual Environment Distance Perception Perception Distance 3D Visual Effects Abstract It is known that human’s judgment over perception distance in a real environment is different from that in a virtual environment. Differences of perception distance in a real environment versus the one in a virtual environment will create a certain degree of influence over experience of virtual reality. As such, this is considered as an important part to enhance sense of reality in virtual reality. This research shall observe and analyze different condition factors’ influences on perception distance in a real environment as well as a virtual environment. Condition factors include “screen,” “visual effect,” “height of placement,” “size” and “distance.” This experiment is divided into 3 major parts which are real environment distance perception experiment, 49-inch screen distance perception experiment and 95-inch projection screen distance perception experiment. Influences from aforementioned factors over distance perception will be analyzed from experiment results.
It is observed from the results that for participants’ perception distance values from their judgment are all smaller than the ones for actual distance. With respect to “screen,” accuracy for perception distance judgment over 95-inch projection screen is better than the one over 49-inch screen. As for “visual effect,” accuracy for perception distance in a real environment is better than the ones in 2D virtual environment and 3D stereoscopic virtual environment, while the one for 3D stereoscopic virtual environment is better than the one in 2D virtual environment. Positions of objects, whether these objects are placed in high or low positions, have no influence on the judgment over perception distance. Accuracy for perception distance over 10cm sphere is better than the ones over 15cm and 20cm. The smaller an object is, the more accurate judgment over perception distance will be. Precision over the shortest distance is the lowest as compared with the ones presented by other distances. Judgment over perception distance is affected by different positions an object is placed. It is expected that research results can provide effective assistance to researches of enhancement over virtual environment sense of reality and distance perception.
Advisor Committee Cheng-Hung Huang - advisor
Lai-Chung Lee - co-chair
Li-Chieh Chen - co-chair
Files Date of Defense 2016-12-12 Date of Submission 2017-01-17