| Project/Area Number |
15H06345
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Perceptual information processing
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2015-08-28 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | ３次元形状復元 / 照度差ステレオ / コンピュータビジョン |
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| Outline of Final Research Achievements |
We have developed a new photometric stereo method that can work under non-uniform light intensities that are unknown, or with photographs that are recorded with varying and unknown exposure times. By generalizing the conventional photometric stereo formulation, we cast the problem as a joint estimation of surface normal and light intensities, which can be represented as a non-negative bilinear problem. We have shown that this problem has a unique structure unlike general bilinear problems and by exploiting the structure, we have developed an efficient solution method based on alternating minimization for determining both surface normal and light intensities. The solution method is implemented, and with both simulation and real-world experiments, we have confirmed that the developed method shows favorable performance over existing methods that do not consider the light intensity variations.
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