面向瞬态成像仿真的遮挡目标逆向重构方法

doi:10.3969/j.issn.1001-2400.2018.02.012

Abstract

Abstract:

With the development of ultrafast imaging devices, transient imaging can record the movement of light on the femtosecond scale. One of its applications is the reconstruction of hidden 3D shapes, which is to reconstruct the three-dimensional structure of objects hidden outside the camera field. Due to the complex structure, the high price and difficult performance-evaluation of the transient imaging hardware system, this paper presents a new reverse reconstruction algorithm and establishes a transient imaging process using software simulation. Beginning with a simplified heatmap function according to the scene, this reverse algorithm introduces the detecting probability to obtain the sampled data of the object in the scene; after that, it computes the global detecting probability of the object using ray-tracing methods and gets a 3D point cloud by thresholding results; finally, the point cloud is visualized in the 3D space. The result shows that the simulation method presented in this paper is able to describe the transient imaging process of a hidden object in a 3D scene, and that the reverse reconstruction algorithm can improve the reconstruction of hidden objects.

Key words: transient imaging, computational photography, looking around the corner, inverse problems

LI Hairui;WU Xin;ZHANG Jianqi. Reconstruction of the hidden 3D shape for transient imaging simulation[J].Journal of Xidian University, 2018, 45(2): 66-70.

References

［1］ ABRAMSON N. Light-in-flight Recording by Holography［J］. Optics Letters, 1978, 3(4): 121-123.
［2］ NILSSON B, CARLSSON T E. Direct Three-dimensional Shape Measurement by Digital Light-in-flight Holography［J］. Applied Optics, 1998, 37(34): 7954-7959.
［3］ KIRMANI A, HUTCHISON T, DAVIS J, et al. Looking around the Corner Using Ultrafast Transient Imaging［J］. International Journal of Computer Vision, 2011, 95(1): 13-28.
［4］ VELTEN A, WU D, MASIA B, et al. Imaging the Propagation of Light through Scenes at Picosecond Resolution［J］. Communications of the ACM, 2016, 59(9): 79-86.
［5］ VELTEN A, WILLWACHER T, GUPTA O, et al. Recovering Three-dimensional Shape around a Corner Using Ultrafast Time-of-flight Imaging［J］. Nature Communications, 2012, 3(2): 745.
［6］ GUPTA O, WILLWACHER T, VELTEN A, et al. Reconstruction of Hidden 3D Shapes Using Diffuse Reflections［J］. Optics Express, 2012, 20(17): 19096-19108.
［7］ RASKAR R, VELTEN A. Methods and Apparatus for Imaging of Occluded Objects from Scattered Light: US9148649［P］. 2015.
［8］ HEIDE F, HULLIN M B, GREGSON J, et al. Low-budget Transient Imaging Using Photonic Mixer Devices［J］. ACM Transactions on Graphics, 2013, 32(4): 1-10.
［9］ BUTTAFAVA M, ZEMAN J, Tosi A, et al. Non-line-of-sight Imaging Using a Time-gated Single Photon Avalanche Diode［J］. Optics Express, 2015, 23(16): 20997-21011.
［10］ KADAMBI A, ZHAO H, SHI B, et al. Occluded Imaging with Time-of-flight Sensors［J］. ACM Transactions on Graphics, 2016, 35(2): 2836164.
［11］ BHANDARI A, RASKAR R. Signal Processing for Time-of-flight Imaging Sensor: an Introduction to Inverse Problems in Computational 3-D Imaging［J］. IEEE Signal Processing Magazine, 2016, 33(5): 45-58.
［12］ JARABO A, MARCO J, MUNOZ A, et al. A Framework for Transient Rendering［J］. ACM Transactions on Graphics, 2014, 33(6): 1-10.
［13］徐军, 周翔, 梁昌洪. 一种计算红外点目标检测概率的方法［J］. 西安电子科技大学学报, 2001, 28(1): 18-21.
XU Jun, ZHOU Xiang, LIANG Changhong. Calculation of the Detecting Probability of an Infrared Point Target［J］. Journal of Xidian University, 2001, 28(1): 18-21.

Reconstruction of the hidden 3D shape for transient imaging simulation

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