Techniques to estimate depth from image blur are known as Depth from Defocus (DfD), and has been actively studied. In this study, we utilize the projection defocus by a projector with coded aperture. The method estimates the depth by analyzing the amount of blur of reflected light pattern which is projected from projector as a dot grid pattern. In addition, we generated a coded aperture that was designed as an aperture installed in the projector and optimized for DfD by Genetic Algorithm. Advantages of this study are as follows.
- By utilizing blur effects actively, the depth can be estimated in the out-of-focus
area. In the future, the measurement rangne can be extended by combining a conventional
active 3D measurement method.
- Since the baseline between a camera and a projector is not necessary, the system can be compact.
- Measurement accuracy can be improved by using coded aperture
Fig.1 Diagram of optical system and actual optical system
Fig.2 Arbitrary shape estimation
Publications
[1] Yuki Horita, Satoshi Ono, Hiroshi Kawasaki, Makoto Kimura, Yasuo Takane
"Robust active 3D measurement method against bokeh using projector-camera system with coded aperture"
IEICE Transactions on Fundamentals of Electronics, J96-D, pp.1823-1833, 8.2013
[2] Hiroshi Kawasaki, Yuki Horita, Hitoshi Masuyama, Satoshi Ono, Makoto Kimura, Yasuo Takane
"Optimized Aperture for Estimating Depth from Projector's Defocus"
International Conference on 3D Vision (3DV2013), pp.135-142, 6.2013
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