High-Contrast Color-Stripe Pattern for Rapid Structured-Light Range Imaging
High-Contrast Color-Stripe Pattern for Rapid Structured-Light Range Imaging
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DOI：
10.1007/978-3-540-24670-1_8
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发表时间：
2004-05
期刊：
影响因子：
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通讯作者：
Changsoo Je;S. W. Lee;Rae-Hong Park
中科院分区：
文献类型：
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作者：
Changsoo Je;S. W. Lee;Rae-Hong Park
对于结构光范围成像，与二进制BW条纹相比，彩色条纹可以用于增加可区分的光图案的数量。因此，适当地使用颜色图案可以减少光投影的数量，并且可以在单个视频帧或“一次拍摄”中实现距离成像。另一方面，从彩色条纹可获得的可靠性和范围分辨率通常低于从多重投影的二进制BW图案，因为颜色对比度受物体颜色反射率和环境光的影响。本文提出了一种选择条纹颜色和设计多条纹图案的新方法，用于“一次拍摄”和“两次拍摄”成像。我们表明，最大限度地提高单次成像中的条纹之间的颜色对比度，减少了由彩色物体表面和传感器/投影仪分辨率的限制造成的模糊性。两次拍摄成像增加了一个额外的视频帧，并最大限度地提高了第一和第二视频帧之间的颜色对比度，以进一步减少模糊性。实验结果表明，所提出的一次和两次彩色条纹成像方案的有效性。
For structured-light range imaging, color stripes can be used for increasing the number of distinguishable light patterns compared to binary BW stripes. Therefore, an appropriate use of color patterns can reduce the number of light projections and range imaging is achievable in single video frame or in “one shot”. On the other hand, the reliability and range resolution attainable from color stripes is generally lower than those from multiply projected binary BW patterns since color contrast is affected by object color reflectance and ambient light. This paper presents new methods for selecting stripe colors and designing multiple-stripe patterns for “one-shot” and “two-shot” imaging. We show that maximizing color contrast between the stripes in one-shot imaging reduces the ambiguities resulting from colored object surfaces and limitations in sensor/projector resolution. Two-shot imaging adds an extra video frame and maximizes the color contrast between the first and second video frames to diminish the ambiguities even further. Experimental results demonstrate the effectiveness of the presented one-shot and two-shot color-stripe imaging schemes.