Patent ID: 8854501

Claim:
An apparatus for processing spectral image data of an object, the apparatus comprising: a first normalization unit configured to normalize spectral data of each pixel of the spectral image data with respect to luminance level, the luminance level being different for different areas formed on the object, wherein the spectral image data contains spectral data for each pixel representing an intensity corresponding to a wavelength; an image clustering unit configured to determine, by using the spectral data normalized by the first normalization unit, which segment each pixel of the spectral image data belongs to based on a first deviation amount between the normalized spectral data of a reference pixel of the spectral image data and the normalized spectral data of a target pixel to be clustered thereof; a second normalization unit configured to normalize spectral data of each of the segments determined by the image clustering unit, based on spectral data of light sources corresponding to each of the determined segments; and a segment integration unit configured to integrate the determined segments based on a second deviation amount of the spectral data normalized by the second normalization unit.