| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1997: ¥3,100,000 (Direct Cost: ¥3,100,000)
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| Research Abstract |
1.Development of a malti-channel camera and estimation of spectral information
A malti-channel camera is proposed for estimating spectral information from the camera data. The system is constructed with a monochrome CCD camera and six color filters, which decomposes the visible spectrum into six wavelength bands. This system makes it possible to estimate both spectral functions of the spectral power distribution of illumination and the surfacespectral reflectances of objects. Next we have improved the camera system and the estimation method of spectral reflectances, and developed several image processing algorithms for the sixdimensional camera data. Moreover a new type of multi-channel camera system was consideredusing liquid crystal filters.
2.Trial production of a lighting system for color image measurement
A lighting system is proposed for measuring color images under a variety of illumination. This system is constructed with halogen lamps, color filters, white diffusion filters, diim
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ners, and a personal computer as a controller. Colored light with continuous spectral power distribution is produced based on the additive color mixture of RGB primary lights. A practical procedure is presented for easily producing the colored light with any chromaticity coordinates (x, y) specified within the color gamut. This lighting system was applied to computer vision.
3 Estimation of scene parameters and a reflection model from a color image
A method is proposed for estimating various parameters of a reflection model from a single color image measured with a RGB camera. The estimated parameters are (1) object color vector, (2) illumination direction, (3) illumination color vector, (4) surface roughness, and (5) ratio of interface to body intensity, Next, we have developed a method for estimating the reflection parameters including spectral information by using a six-color camera. The Phong reflection model is used for an inhomogeneous dielectric object. The object's shape is assumed to be cylindrical. Less
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