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Proceedings Paper

Generation of elemental image array based on photon mapping
Author(s): Zhengnan Xu; Yan Zhao; Aijia Zhang; Shigang Wang
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Paper Abstract

The current algorithms of generating element image array using ray-tracing are complex. Although the quality of images generated by ray tracing is high, it requires a lot of double counting. Therefore, we propose to utilize photon mapping algorithm for generating element image array to reduce a lot of calculations in this paper. First, for a given virtual model, a light source is set, the photon emission vector is calculated and photons are tracked. A global photon map is used to store the energy and incident direction of the photons. Then, we trace rays of light that start from the viewpoint and pass through each pixel into the scene, and record the surface material of the first collision point into the photon map. The image of one view point can be generated according to the estimated rays of light by photon map. The photon map need to be generated only once for all images of different viewpoints. Finally, the images of different viewpoints are converted into an element image array. Experimental results show that the proposed method improves the generation speed of element image array significantly in the complex scene, especially for the generation of multiple images. While in the simple scene, the proposed method might be slightly slower for generating one image, but it still shows its advantages in the case of generating multiple images.

Paper Details

Date Published: 18 November 2019
PDF: 7 pages
Proc. SPIE 11187, Optoelectronic Imaging and Multimedia Technology VI, 111871O (18 November 2019); doi: 10.1117/12.2538071
Show Author Affiliations
Zhengnan Xu, Jilin Univ. (China)
Yan Zhao, Jilin Univ. (China)
Aijia Zhang, Jilin Univ. (China)
Shigang Wang, Jilin Univ. (China)

Published in SPIE Proceedings Vol. 11187:
Optoelectronic Imaging and Multimedia Technology VI
Qionghai Dai; Tsutomu Shimura; Zhenrong Zheng, Editor(s)

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