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題名 | 以透視投影共線性校正補償斜投影的成像=Rendering under Oblique Projection Using Perspective Projection Collinearity |
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作者 | 胡興民; | 書刊名 | 東方學報 |
卷期 | 31 2011.05[民100.05] |
頁次 | 頁43-51 |
分類號 | 471.7 |
關鍵詞 | 圖像生成; 透視投影共線性; 立體顯示; 全景投影; Rendering; Perspective projection collinearity; Stereo display; Panoram; |
語文 | 中文(Chinese) |
中文摘要 | 文中審視投影屏幕的投影校正與圖像生成(render),首先描述平面投影的技術,與任意非平面的投射;然後專注在視程(visibility)計算以解決深度值損傷問題-本文所提出方法,不會有影像裁切(clipping)現象,不增加圖像生成的代價。利用透視投影共線性使斜投影也能應用於大屏幕顯示,而且是更有效率的單一回合成像方式-不會產生重新取樣(resample)的人造影像(artifact);本方法的校正補償斜投影之成像,不需投影機的事先精確校準工作,有利於快速建構一簡易的大屏幕顯示。 |
英文摘要 | In the paper, we survey the calibration and rendering schemes for display surfaces. We first describe the strategy for planar displays and arbitrary non-planar displays. We then focus on the visibility computation to keep the depth values intact, which avoids undesired clipping and does not increase the cost of rendering. By using perspective projection collinearity, we show that oblique projectors can be used to easily create immersive displays, and one-pass rendering is more efficient and introduces no resampling artifacts. The proposed algorithm need not worry about achieving some predefined alignment of the projector, which is useful for quickly setting up a simple large display and can eliminate cumber-some electro-mechanical adjustment. |
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