Patent Document ID: 8325393
Application ID: 12483182
Patent Status: 1

Claim One:
1. A color chart reading apparatus for acquiring colorimetric values of color patches by using a colorimeter which is manually slid by a user to perform colorimetry while scanning the color patches in the color chart on a row-by-row basis, the color chart reading apparatus comprising: a colorimetric value storage unit configured to store: a first feature value relating to color arrangement of color patches of a multi-row having a color-difference for each row, in a predetermined scanning direction by the colorimeter for each row number and a third feature value for each row number, the third feature value being obtained when colorimetry is performed while the user slides the colorimeter in the direction opposite to the predetermined scanning direction relative to the color chart; wherein the first feature value and the third feature value for each row are information items indicating the position of a patch having a larger color difference between the patch and the adjacent patch than the color difference between other adjacent patches, and the information items corresponding to the first and third feature values for each row differ from each other a feature value calculation unit configured to calculate a feature of the color arrangement of the color patches in each measured row as a second feature value based on the colorimetric values of the color patches acquired by the colorimeter in the predetermined scanning direction; and a determination unit configured to: compare the second feature value calculated by the feature value calculation unit in each measured row with the corresponding first feature value stored by the colorimetric value storage unit for each row and to determine whether the colorimetry by the colorimeter has succeeded or not based on a result of the comparison, to determine that colorimetry has been performed in the predetermined direction when the second feature value matches with the first feature value; compare the second and third feature values to determine that colorimetry has been performed in the opposite direction when the second feature value matches with the third feature value; and determine an error when the second feature value does not match with each of the first and third feature values.