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Hemispherical Confocal Imaging Using Turtleback Reflector [chapter]

Yasuhiro Mukaigawa, Seiichi Tagawa, Jaewon Kim, Ramesh Raskar, Yasuyuki Matsushita, Yasushi Yagi
2011 Lecture Notes in Computer Science  
We propose a new imaging method called hemispherical confocal imaging to clearly visualize a particular depth in a 3-D scene.  ...  By combining the turtleback reflector with a coaxial pair of a camera and a projector, many virtual cameras and projectors are produced on a hemisphere with uniform density to synthesize a hemispherical  ...  Virtual projector and cameras are distributed on a hemisphere with uniform density by using the turtleback reflector. Fig. 4 . 4 Design of the turtleback reflector.  ... 
doi:10.1007/978-3-642-19315-6_26 fatcat:dofyqogcj5bn3lh2uocxtqinf4

Hemispherical Confocal Imaging

Seiichi Tagawa, Yasuhiro Mukaigawa, Jaewon Kim, Ramesh Raskar, Yasuyuki Matsushita, Yasushi Yagi
2011 IPSJ Transactions on Computer Vision and Applications  
We propose a new imaging method called hemispherical confocal imaging to visualize clearly a particular depth in a 3-D scene.  ...  To synthesize a hemispherical aperture, we combined the turtleback reflector with a coaxial camera and projector, to create on a hemisphere many virtual cameras and projectors with a uniform density.  ...  Fig. 6 6 Design of the frame for the turtleback reflector. Fig. 7 7 Turtleback reflector. Fig. 8 8 Total optical device for hemispherical confocal imaging.  ... 
doi:10.2197/ipsjtcva.3.222 fatcat:55gyxjtt6bhwtgpiydjntgnosq

Full-dimensional Sampling and Analysis of BSSRDF

Chika Inoshita, Seiichi Tagawa, Md. Abdul Mannan, Yasuhiro Mukaigawa, Yasushi Yagi
2013 IPSJ Transactions on Computer Vision and Applications  
We sample this full-dimensional BSSRDF using a polyhedral mirror system to place a lot of virtual cameras and projectors.  ...  The left column of Fig. 5 shows captured images by (a) Turtleback Reflector (b) System overview Turtleback Reflector Fig. 3 Fig. 4 34 Sampling positions on a hemisphere.  ...  These mirror systems are designed for special imaging methods such as shallow DOF imaging and confocal imaging.  ... 
doi:10.2197/ipsjtcva.5.119 fatcat:p7wpnmgrhraa5h4kmckrb5gcj4

Ultra-Shallow DoF Imaging Using Faced Paraboloidal Mirrors [chapter]

Ryoichiro Nishi, Takahito Aoto, Norihiko Kawai, Tomokazu Sato, Yasuhiro Mukaigawa, Naokazu Yokoya
2017 Lecture Notes in Computer Science  
In experiments, we demonstrate the effectiveness of the proposed method using both simulation and an actually developed prototype imaging system.  ...  In the device, a lens-less image sensor is set at one side of their holes and an object is set at the opposite side.  ...  [12] proposed a specially designed polyhedral mirror called "turtleback reflector", which can possibly achieve infinite-size aperture by reflecting light rays on mirrors arranged on a hemisphere placed  ... 
doi:10.1007/978-3-319-54187-7_8 fatcat:53axnge4dvfztcy6ibi5jpdwty

多視点画像取得のためのミラーアレイ配置の検討(アンコンベンショナルカメラとイメージセンサおよび一般)
Study on mirror array layout for capturing multi-viewpoint images

Hayato KURODA, Takashi KOMURO, Ryosuke KUJIME, Shiro SUYAMA, Hirotsugu YAMAMOTO
2013 ITE Technical Report  
We conducted a stUdy on mirror array layout to extend fields of view of the virtual cameras for capturing multi −viewpoint images by using a mirror array .  ...  We thought of four cases ; a 田 ines of sight are parallel , all lines of sight cross at a certain point ofthe object , multiple mirrors are used to obtain a wide view angle , and each virtUal camera looks  ...  ACM S [ GGRAPH2004 、 pp . 825 − 834 , 2004 . [ 5 ] Yasuhiro Mukaigawa , Seiiehi Tagawa 、 Jaewon Kin , Ramesh Raskar , Yasuyuki Matsushita, and YasushiYagi : " Hemispherical Confocal Imaging using Turtleback  ... 
doi:10.11485/itetr.37.48.0_5 fatcat:i2ixmieuxrbh3lgz6snck46cpi

Structure of Multiple Mirror System from Kaleidoscopic Projections of Single 3D Point [article]

Kosuke Takahashi, Shohei Nobuhara
2021 arXiv   pre-print
This paper proposes a novel algorithm of discovering the structure of a kaleidoscopic imaging system that consists of multiple planar mirrors and a camera.  ...  We demonstrate the performance of the proposed algorithm of chamber assignment and estimation of mirror parameters with qualitative and quantitative evaluations using synthesized and real data.  ...  [31] introduce a hemispherical confocal imaging using a turtleback reflector, and Inoshita et al.  ... 
arXiv:2103.15501v1 fatcat:zp74xyhgrfa5lme7osfhh7maqe