cam11-17Adequate Reconstruction of Transparent Objects on a Shoestring Budget.pdfVIP

Adequate Reconstruction of Transparent Objects on a Shoestring Budget∗ Sai-Kit Yeung 1,2 Tai-Pang Wu 2 Chi-Keung Tang 2 Tony F. Chan1,2 Stanley Osher 1 saikit@math.ucla.edu pang@cse.ust.hk cktang@cse.ust.hk tonyfchan@ust.hk sjo@math.ucla.edu 1 University of California, Los Angeles 2 The Hong Kong University of Science and Technology Abstract Reconstructing transparent objects is a challenging problem. While producing reasonable results for quite com- Figure 1. Six images showing a typical input (example FISH). plex objects, existing approaches require custom calibrat ion Most pixels do not record highlight in these images, indicating or somewhat expensive labor to achieve high precision. On a sparse set of images is inadequate for applying orientation con- the other hand, when an overall shape preserving salient sistency. and fine details is sufficient, we show in this paper a sig- nificant step toward solving the problem on a shoestring this level of precision is sufficient, it is possible to propose a budget, by using only a video camera, a moving spotlight, reconstruction approach that uses a simpler setup realizable and a small chrome sphere. Specifically, the problem we using a smaller budget. address is to estimate the normal map of the exterior sur- Without expensive or complicated setup while still sup- face of a given solid transparent object, from which the sur- porting an adequate reconstruction, what visual cues con- face depth can be integrated. Our technical contr