隨著顯示技術發展，3D 立體顯示器技術也有相當亮眼的進展。目前已經廣泛應用於娛樂、科學、教育與軍事。然而，雖然目前世界上的立體顯示技術五花八門，但3D顯示器產業尚未能成功打入大眾市場，主要原因是目前立體顯示技術仍待突破，立體顯示器的影像品質與對觀看者造成的視覺疲勞是其目前發展的最大限制。許多研究指出影像之交錯殘影(Crosstalk)是影響影像品質和視覺疲勞最大的主因，常造成觀看者心理與生理的負擔，另外3D深度知覺線索也會影響觀看者主觀的影像品質評價。

本研究規劃兩視域(Two-view)立體視覺之人因研究，探討交錯殘影和與觀看者所感受到的主觀影像品質兩者之間的關連性。本研究以Mirror-type顯示器進行實驗，其研究的自變項包含系統交錯殘影(Crosstalk)、陰影、主背景亮度對比和影像極性，應變項則包含主觀的影像品質評估與主客觀的疲勞評估。受試者為從事立體顯示相關的工程師與從未接觸立體顯示器的研究生，探討專家與新手是否對立體感知覺有不同的感受。

實驗結果證實影像之交錯殘影和陰影的確對主觀的立體影像品質造成顯著影響，圖片的交錯殘影程度越高，主觀影像品質也隨之變差，本實驗對兩視域的Mirror-type立體顯示器的最高人眼可接受的交錯殘影程度建議為8%。有陰影的圖片更能加強其主觀影像品質，另外也發現陰影和主背景亮度對比的交互作用對深度造成影響，越明亮的背景更應該注意適當的陰影呈現。然而本實驗並未發現主背景亮度對比和影像極性對主觀影像品質有顯著的影響，影像交錯殘影造成的主客觀疲勞也因觀看時間不夠長而未能達到顯著，表示觀看十分鐘的立體影像並不會對觀看者造成太大的疲勞。

The technology of 3D displays has made impressive progress as much as technological advance in display, its wide application including entertainment, science, education, and military. However, the technologies of stereoscopic displays abound in the current industry, but they still fail to enter the mass market due to the numerous problems in terms of image quality of stereoscopic displays and asthenopia to viewers. “System crosstalk” is the main cause of 3D image quality and asthenopia, causing the viewers’ mental and physical loading. In addition, depth perception cues have impact on viewers’ subjective evaluation toward image quality as well.

In this study, a human factors study on the two-view auto-stereoscopic display was conducted, investigating the relation between system crosstalk and perceived image quality. This study is based on mirror-type stereoscopic display. The independent variables were system crosstalk, shadow, luminosity contrast ratio, and polarity while the dependent variables were subjective evaluation toward image quality as well as objective and subjective evaluation toward asthenopia. The participants were engineers researching on stereoscopic displays and graduate students who never experienced stereoscopic displays. The difference between these two groups was also examined in this study.

The experimental results confirm that the main effects of system crosstalk and shadow on perceived stereo image quality is statistically significant. Perceived stereo image quality declines as system crosstalk of images increases. The threshold of system crosstalk for two-view auto-stereoscopic display is recommended to be 8%. In addition, the image showing with shadow elevates stereo image quality. Furthermore, the interaction effect of shadow and luminosity contrast ratio on a sense of depth also attained statistical significance in this study, indicating that brighter background images should take notice of the properly existence of shadow. However, the main effects of luminosity contrast ratio and polarity were not significant; asthenopia caused by stereo images was not due to the insufficient experimental time of watching stereo images, meaning that ten minutes may be too short to cause asthenopia to viewers.

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