Robotics and Computer Vision Lab

Publications

International Conference
2014.03.18 11:25

Calibrating a non-isotropic near point light source using a plane

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저 자 Jaesik Park, Sudipta N. Sinha, Yasuyuki Matsushita, Yu-Wing Tai, In So Kweon
학 회 IEEE International Conference on Computer Vision and Pattern Recognition (CVPR)
논문일시(Year) 2014
논문일시(Month) 06
http://rcv.kaist.ac.kr/~jspark/projects/light_calibration/We show that a non-isotropic near point light source rigidly attached to a camera can be calibrated using multiple images of a weakly textured planar scene. We prove that if the radiant intensity distribution (RID) of a light source is radially symmetric with respect to its dominant direction, then the shading observed on a Lambertian scene plane is bilaterally symmetric with respect to a 2D line on the plane. The symmetry axis detected in an image provides a linear constraint for estimating the dominant light axis. The light position and RID parameters can then be estimated using a linear method. Specular highlights if available can also be used for light position estimation. We also extend our method to handle non-Lambertian reflectances which we model using a biquadratic BRDF. We have evaluated our method on synthetic data quantitavely. Our experiments on real scenes show that our method works well in practice and enables light calibration without the need of a specialized hardware.

List of Articles
224. Accurate Depth Map Estimation from a Lenslet Light Field Camera
Hae-Gon Jeon, Jaesik Park, Gyeongmin Choe, Jinsun Park, Yunsu Bok, Yu-Wing Tai, In So Kweon
IEEE International Conference on Computer Vision and Pattern Recognition (CVPR) 2015 / 06
223. Fast Randomized Singular Value Thresholding for Nuclear Norm Minimization
Tae-Hyun Oh, Yasuyuki Matsushita, Yu-Wing Tai, In So Kweon
IEEE International Conference on Computer Vision and Pattern Recognition (CVPR) 2015 / 06
222. Multispectral Pedestrian Detection: Benchmark Dataset and Baselines
Soonmin Hwang, Jaesik Park, Namil Kim, Yukyung Choi, In So Kweon
IEEE International Conference on Computer Vision and Pattern Recognition (CVPR) 2015 / 06
221. Specular Reflection Separation Using Dark Channel Prior
Hyeongwoo Kim, Hailin Jin, Sunil Hadap, In So Kweon
IEEE International Conference on Computer Vision and Pattern Recognition (CVPR) 2013 / 06
220. Hybrid vision-based SLAM coupled with moving object tracking
Jihong Min, Jungho Kim, Hyeongwoo Kim, Kiho Kwak, In So Kweon
International Conference on Robotics & Automation (ICRA) 2014 / 05
219. A Two Phase Approach for Pedestrian Detection
Soonmin Hwang, Tae-Hyun Oh, In So Kweon
The 12th Asian Conference on Computer Vision Workshops (ACCV Workshops) 2014 / 11
218. Robust Binary Feature Using Intensity Order
Yukyung Choi, Chaehoon Park, Joon-Young Lee, In So Kweon
The 12th Asian Conference on Computer Vision (ACCV) 2014 / 11
217. Accelerated kmeans Clustering using Binary Random Projection
Yukyung Choi, Chaehoon Park, In So Kweon
The 12th Asian Conference on Computer Vision (ACCV) 2014 / 11
216. Real-time Head Orientation from a Monocular Camera using Deep Neural Network
Byungtae Ahn, Jaesik Park, In So Kweon
The 12th Asian Conference on Computer Vision (ACCV) 2014 / 11
215. Motion Deblurring using Coded Exposure for a Wheeled Mobile Robot
Kibaek Park, Seunghak Shin, Hae-Gon Jeon, Joon-Young Lee, In So Kweon
The 11th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) 2014 / 11
214. RGBD Sensor and Mirrors: a Practical Setup for 3D Reconstruction of Dynamic Objects
Min-Hyun Kim, Jaesik Park, In So Kweon
The 11th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) 2014 / 11
213. A Simple and Real-Time Moving Object Detection Invariant to Cast Shadow
Tae-Hyun Oh, In So Kweon
The 11th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) 2014 / 11
212. A Fusion Approach for Robust Visual Object Tracking in Crowd Scenes
Tae-Hyun Oh, Kyungdon Joo, Junsik Kim, Jaesik Park, In So Kweon
The 11th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) 2014 / 11
211. Geometric Calibration of Micro-Lens-Based Light-Field Cameras using Line Features
Yunsu Bok, Hae-Gon Jeon, In So Kweon
European Conference on Computer Vision (ECCV) 2014 / 09
210. Extrinsic Calibration of 2D Laser Sensors
Dong-Geol Choi, Yunsu Bok, Jun-sik Kim, In So Kweon
International Conference on Robotics & Automation (ICRA) 2014 / 05
209. Extrinsic Calibration of Non-overlapping Camera-Laser System using Structured Environment
Yunsu Bok, Dong-Geol Choi, Pascal Vasseur, In So Kweon
IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) 2014 / 09
208. GMM-based Saliency Aggregation for Calibration-free Gaze Estimation
Jinsoo Choi, Byungtae Ahn, Jaesik Park, In So Kweon
International Conference on Image Processing (ICIP) 2014 / 10
207. Cost-Aware Depth Map Estimation for Lytro Camera
Min Jung Kim, Tae-Hyun Oh, In So Kweon
International Conference on Image Processing (ICIP) 2014 / 10
206. Balanced Optical Flow Refinement by Bidirectional Constraint
Jongwon Choi, Hyeongwoo Kim, Tae-Hyun Oh, In So Kweon
International Conference on Image Processing (ICIP) 2014 / 10
205. Auto-adjusting Camera Exposure for Outdoor Robotics using Gradient Information
Inwook Shim, Joon-Young Lee, In So Kweon
IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) 2014 / 09
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