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서브픽셀분류를 활용한 프로젝터-카메라 대응관계 향상기법
임규제(Kyu Je Lim),박민기(Min Ki Park),이용이(Yong Yi Lee),최준호(Jun Ho Choi),이종훈(Jong Hoon Lee),이관행(Kwan H. Lee) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.동계
Projector-camera system is used for implementing spatial augmented reality which project virtual contents onto real object and 3D scanning. In this system, a gray code structured light sequence is used for encoding projector coordinate because a projector doesn’t take a picture like camera. And then, we set projectorcamera correspondence after decoding encoded projector coordinates for using captured images. However, we found incorrect set of projector-camera correspondence caused by effect of ambient light and strong interreflection from other surface patches. It leads to a result of incorrect 3D scanning. In this paper, we propose a method to improve projector-camera correspondence by using sub-pixel classification. Our method will improve projector-camera correspondence after classifying correct correspondence and incorrect correspondence automatically. The proposed method has advantages robust to varying threshold values in contrast to previous methods. And, it can be used to a variety of applications.
박민기(Min Ki Park),서명국(Myoung Kook Seo),임규제(Kyu Je Lim),이관행(Kwan H. Lee) (사)한국CDE학회 2014 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2014 No.2
Augmented reality based on projection, called “Spatial augmented reality(SAR)”, is a new technology that can produce immersive contents by overlapping virtuality and real-world environment. It has been paid attention as the next generation digital contents in media art and human-computer interaction (HCI). In this paper, we present a new methodology to evaluate the product appearance design more intuitively by means of SAR technique. The proposed method first projects the high-quality rendered image considering the optical property of materials onto the mock-up of a product. We also conduct a projector-camera calibration to compensate a color distortion according to a projector, a projection surface and environment lighting. The design evaluation methodology we propose offers more flexible and intuitive evaluation environment to a designer and user (evaluator) than previous methods that are performed via a digital display. At the end of this research, we conduct a case study for designing and evaluating a new refrigerator design.