Robotics and Computer Vision Lab

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International Conference
2015.08.31 11:20

Accurate Camera Calibration Robust to Defocus using a Smartphone

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저 자 Hyowon Ha, Yunsu Bok, Kyungdon Joo, Jiyoung Jung, In So Kweon
학 회 IEEE International Conference on Computer Vision (ICCV)
Notes This research is supported by the National Research Foundation, Korea, under the NRF-ANR joint research programme (No. 2011-0031920).
논문일시(Year) 2015
논문일시(Month) 12
We propose a novel camera calibration method for defocused images using a smartphone under the assumption that the defocus blur is modeled as a convolution of a sharp image with a Gaussian point spread function (PSF). In contrast to existing calibration approaches which require wellfocused images, the proposed method achieves accurate camera calibration with severely defocused images. This robustness to defocus is due to the proposed set of unidirectional binary patterns, which simplifies 2D Gaussian deconvolution to a 1D Gaussian deconvolution problem with multiple observations. By capturing the set of patterns consecutively displayed on a smartphone, we formulate the feature extraction as a deconvolution problem to estimate feature point locations in sub-pixel accuracy and the blur kernel in each location. We also compensate the error in camera parameters due to refraction of the glass panel of the display device. We evaluate the performance of the proposed method on synthetic and real data. Even under severe defocus, our method shows accurate camera calibration result.

List of Articles
263. Sentence Learning on Deep Convolutional Networks for Image Caption Generation
Dong-Jin Kim, Donggeun Yoo, Bonggeun Sim, In So Kweon
The International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) 2016 / 08
262. EureCar Turbo: a Self-Driving Car that can Handle Adverse Weather Conditions
Unghui Lee, Jiwon Jung, Seunghak Shin, Yongseop Jeong, Kibaek Park, David Hyunchul Shim, In So Kweon
The International Conference of Intelligent Robots and Systems (IROS) 2016 / 10
261. Object Proposal Using 3D Point Cloud for DRC-HUBO+
Seunghak Shin, Inwook Shim, Jiyoung Jung, Yunsu Bok, Jun-Ho Oh, In So Kweon
The International Conference of Intelligent Robots and Systems (IROS) 2016 / 10
260. Fast Multiple Objects Detection and Tracking Fusing Color Camera and 3D LIDAR for Intelligent Vehicles
Soonmin Hwang, Namil Kim, Yukyung Choi, Seokju Lee, In So Kweon
The International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) 2016 / 08
1
259. Thermal Image Enhancement using Convolution Neural Network
Yukyung Choi, Namil Kim, Soonmin Hwang, In So Kweon
The International Conference of Intelligent Robots and Systems (IROS) 2016 / 10
258. Thermal-Infrared based Drivable Region Detection
Jae Shin Yoon, Kibaek Park, Soonmin Hwang, Namil Kim, Yukyung Choi, Francois Rameau, In So Kweon
IEEE Intelligent Vehicles Symposium (IV) 2016 / 06
257. Vision system and depth processing for DRC-HUBO+
Inwook Shim, Seunghak Shin, Yunsu Bok, Kyungdon Joo, Dong-Geol Choi, Joon-Young Lee, Jaesik Park, Jun-Ho Oh, In So Kweon
IEEE International Conference on Robotics and Automation(ICRA) 2016 / 05
256. Efficient and Robust Color Consistency for Community Photo Collections
Jaesik Park, Yu-Wing Tai, Sudipta N. Sinha, In So Kweon
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2016 / 06
255. Globally Optimal Manhattan Frame Estimation in Real-time
Kyungdon Joo, Tae-Hyun Oh, Junsik Kim, In So Kweon
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2016 / 06
254. Video-Story Composition via Plot Analysis
Jinsoo Choi, Tae-Hyun Oh, In So Kweon
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) [Spotlight] 2016 / 06
253. Automatic Content-Aware Color and Tone Stylization
Joon-Young Lee, Kalyan Sunkavalli, Zhe Lin, Xiaohui Shen, In So Kweon
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) [spotlight] 2016 / 06
252. Simultaneous Estimation of Near IR BRDF and Fine-Scale Surface Geometry
Gyeongmin Choe, Srinivasa G. Narasimhan, In So Kweon
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) [Spotlight] 2016 / 06
251. High-quality Depth from Uncalibrated Small Motion Clip
Hyowon Ha, Sunghoon Im, Jaesik Park, Hae-Gon Jeon, In So Kweon
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) [oral] 2016 / 06
250. Stereo Matching with Color and Monochrome Cameras in Low-light Conditions
Hae-Gon Jeon, Joon-Young Lee, Sunghoon Im, Hyowon Ha, In So Kweon
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2016 / 06
249. Human Action Recognition by Attention and Object Network
Bonggeun Sim, Youngjin Yoon, Donggeun Yoo, In So Kweon
22th Korea-Japan Joint Workshop on Frontiers of Computer Vision 2016 / 02
248. Combinatorial Approach for Lane Detection using Image and LIDAR Reflectance
Seunghak Shin, Inwook Shim, In So Kweon
The 12th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) 2015 / 10
247. Learning a Deep Convolutional Network for Light-Field Image Super-Resolution
Youngjin Yoon, Hae-Gon Jeon, Donggeun Yoo, Joon-Young Lee, In So Kweon
IEEE International Conference on Computer Vision Workshops (ICCV Workshops -CPCV) 2015 / 12
246. 6-DOF Direct Homography Tracking with Extended Kalman Filter
Hyowon Ha, Francois Rameau, In So Kweon
The 7th Pacific Rim Symposium on Image and Video Technology (PSIVT) [oral] 2015 / 11
245. AttentionNet: Aggregating Weak Directions for Accurate Object Detection
Donggeun Yoo, Sunggyun Park, Joon-Young Lee, Anthony Paek, In So Kweon
IEEE International Conference on Computer Vision (ICCV) 2015 / 12
244. Complementary Sets of Shutter Sequences for Motion Deblurring
Hae-Gon Jeon, Joon-Young Lee, Yudeog Han, Seon Joo Kim, In So Kweon
IEEE International Conference on Computer Vision (ICCV) 2015 / 12
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