Optical Media Interface

Research Staff

  • Prof. Yasuhiro Mukaigawa

    Yasuhiro Mukaigawa

  • Assoc.Prof. Takuya Funatomi

    Takuya Funatomi

  • Assist.Prof. Hiroyuki Kubo

    Hiroyuki Kubo

  • Assist.Prof. Kenichiro Tanaka

    Kenichiro Tanaka

E-mail { mukaigawa, funatomi, hkubo, ktanaka }[at] is.naist.jp

Research Area

In this laboratory, we focus on photometric analysis in the computer vision research field which aims to comprehend scenes according to optical information obtained by cameras. Our goal is to realize new interfaces that will allow humans and machines to share scene information through optical media based on measuring and analyzing techniques of a light transport.

Photometric analysis

Physics-based vision

Analysis of reflection and scattering

3-D shape reconstruction

Fig. 1 shows the reflection and scattering of light rays emitted from a light source and reflected on opaque surfaces and/or scattered in translucent media. These phenomena are analyzed based on physics.

Sensing system design design

Optical systems for measuring light transport

Near-infrared imaging

Multifunctional imaging by combining reflectors with camera

Fig. 2 shows two sensing systems. The upper row shows a measuring system of reflection properties using an ellipsoidal mirror. The lower row shows a measuring system of 8-D light transport using a polyhedral mirror.

Computational photography

Visualization of invisible scenes by computation

Descattering for image sharpening

Fig. 3 shows examples of computational photography. This system, called Parallel High Frequency Illumination, can decompose transmissive and scattering rays. By collecting only transmissive rays, clear images can be obtained.

Material texture expression

Representation of a variety of materials by CG

Material estimation using camera

Estimation of optical properties

Fig. 4 shows differences among various materials. These CG images show that we can estimate the materials based on the light propagation.

Key Features

Our research interests stand on both computer vision and computer graphics techniques, which are inextricably linked together. Some of this research has interdisciplinary applications in areas such as medical and agriculture, and is performed in collaboration with other universities and companies.

Fig.1 Reflection and scattering.

Fig.1 Reflection and scattering.

Fig.2 Sensing systems.

Fig.2 Sensing systems.

Fig.3 Examples of computational photography.

Fig.3 Examples of computational photography.

Fig.4 Difference of materials.

Fig.4 Difference of materials.