Patent ID: 7206074

Claim:
A spectral reflectance measurement apparatus for measuring spectral reflectance of a measurement object, comprising: an image pickup part for picking up an image of an object to acquire a plurality of single-band images corresponding to a plurality of wavelengths; a correction factor setting part for setting a plurality of correction factors in accordance with distances from a specified pixel by using a plurality of reference single-band images of a reference object which are acquired by said image pickup part; and a spectral reflectance calculation part for obtaining a corrected value of a specified pixel for each of a plurality of measurement single-band images of a predetermined area on a measurement object which are acquired by said image pickup part, by using a value of said specified pixel, values of pixels surrounding said specified pixel and said plurality of correction factors and calculating a reflectance of a position on said measurement object which corresponds to said specified pixel on the basis of said corrected value.