Patent ID: 7675621
Filing Date: 2010-03-09
Classification: G01J

Abstract:
1. A two-dimensional colorimeter comprising: an image sensing section, including an image sensor constituted of a number of pixels arranged in a two-dimensional manner, for sensing an object image to be measured to acquire a two-dimensional image; a discriminator for discriminating whether a targeted color with respect to the two-dimensional image acquired by the image sensing section is to be corrected in terms of a pixel or pixels; a calculator for performing a calculation to apply predetermined correction information corresponding to the color to be corrected to the two-dimensional image in terms of a pixel or pixels, based on a discrimination result by the discriminator; and a storage for storing discrimination chromaticity values for discriminating whether the targeted color is the color to be corrected, and calibration coefficients as the correction information in association with the discrimination chromaticity values, wherein the discrimination chromaticity values are information relating to chromaticity ranges each having a predetermined range concerning the chromaticity value, the discriminator compares measurement chromaticity values as chromaticity values on the two-dimensional image acquired by the image sensing section in terms of a pixel or pixels, with the discrimination chromaticity values stored in the storage, and the calculator selects the calibration coefficient corresponding to the color to be corrected from the calibration coefficients stored in the storage in accordance with a comparison result by the discriminator to multiply the selected calibration coefficient by the measurement chromaticity value.