Patent ID: 8743433
Filing Date: 2014-06-03
Classification: H04N

Abstract:
1. A color measuring device comprising: an image capturing unit configured to output image data of an image-capturing range; a reference chart having multiple patches of different densities and arranged in the image-capturing range; an illumination unit configured to illuminate the image-capturing range; a light quantity control unit configured to control a light quantity of the illumination unit; a generating unit configured to a storage unit configured to store the first correction data and the second correction data; a correction unit configured to correct image data of the reference chart and a color measurement target output from the image capturing unit, using the first correction data or the second correction data, in a case where the image capturing unit captures the reference chart and the color measurement target at the same time; and a calculating unit configured to calculate color measurement value of the color measurement target based on the corrected image data of the reference chart and the color measurement target, wherein the first correction data is data to reduce a difference between a target value calculated by normalizing an index value indicating brightness of the multiple patches in a scale range of the image data and the image data of the multiple patches illuminated by the first light quantity, and the second correction data is data to reduce a difference between the target value and the image data of the multiple patches illuminated by the second light quantity.