Rendering apparatus, multispectral image scanner, and three-dime

Details Rendering apparatus, multispectral image scanner, and three-dime Rendering apparatus, multispectral image scanner, and three-dime

1993-05-14

1996-03-26

Nguyen, Phu K.

G06F 1500

Patent

active

055027997

ABSTRACT:
A rendering apparatus includes: a radiant-energy calculating device for determining a spectral radiance for each infinitesimal area of an object by using a spectral radiance of a light source irradiating the object, a spectral reflectance in the infinitesimal area of the object, and a spectral reflectance factor in a wide area of the object; a color-specification-value calculating device for calculating color specification values of a colorimetric system on the basis of the spectral radiance obtained for each infinitesimal area; a transforming device for transforming the color specification values into image data for displaying an image of the object; and a display device for displaying the image of the object on the basis of the image data.

REFERENCES:
Computer Graphics, vol. 24, No. 4, Aug. 1990, pp. 263-272, A. Takagi, et al., "Accurate Rendering Technique Based on Colorimetric Conception".
Applied Optics, vol. 16, No. 12, Dec. 1977, S. K. Park, et al., "Estimation of Spectral Reflectance Curves From Multispectral Image Data".
Journal of Optical Society of America A, vol. 3, No. 10, 1986, pp. 1673-1683, L. T. Maloney, "Evaluation of Linear Models of Surface Spectral Reflectance with Small Numbers of Parameters".
Journal of the Color Science Association of Japan, vol. 14, No. 1, 1990, pp. 77-78, M. Nakayama, et al., "Estimation of Spectral Reflectances for Color Scanners".
Communication of the ACM, vol. 19, No. 10, 1976, pp. 542-547, J. F. Blinn, et al., "Texture and Reflection in Computer Generated Images".

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