×

Computer graphics system for rendering images using full spectral illumination data

  • US 5,710,876 A
  • Filed: 05/25/1995
  • Issued: 01/20/1998
  • Est. Priority Date: 05/25/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. In a computer controlled graphics display system for displaying an object having an associated surface reflectance function to a plurality of sensors each having an associated sensor response function, a color processing method comprising the steps of:

  • (a) determining at a point on said object an illumination vector whose components represent the weights of predetermined basis functions for a predetermined light source;

    (b) determining a surface matrix responsive to a surface reflectance function at said point, said plurality of predetermined basis functions, and said plurality of sensor response functions wherein each entry in said surface matrix has a value representing ∫

    Xc

    ) s(λ

    ) Ei

    ) dλ

    , which represents a color component for an ith basis function of said plurality of predetermined basis functions, wherein s(λ

    ) represents said surface reflectance function, λ

    represents wavelength, Xc

    ) represents one of said plurality of sensor response functions and Ei

    ) represents one of said plurality of predetermined basis functions for said ith basis function;

    (c) determining a set of colorimetric sensor sensor values at said point including multiplying in a matrix multiplication circuit said surface matrix by said illumination vector, and displaying a picture element on a display responsive to said set of colorimetric sensor sensor values.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×