Patent ID: 8902468
Filing Date: 2014-12-02
Classification: H04N

Abstract:
1. An image correction device comprising: a processor; and a memory storing instructions, which when executed by the processor perform a procedure, the procedure including: (a) controlling an image reading apparatus including an illumination section that illuminates self-illumination light from a first light source onto a read object in a state in which peripheral light from a second light source different than the first light source is being illuminated from a periphery of the read object onto the read object, a standard color chart that is provided in an illuminated region illuminated by the self-illumination light and outside of a mounting region where the read object is mounted, a reading section that reads an image of the read object and reads an image of the standard color chart, and a storage section that stores a self-illuminated reference chart image of a reference chart of size corresponding to the mounting region that has been read in advance by the reading section in a state illuminated by only the self-illumination light, that stores a uniform light standard color chart image of the standard color chart that has been read in advance by the reading section in a state illuminated by only uniform light from a predetermined uniform light source that illuminates light uniformly on a whole region of the standard color chart and the reference chart, and that stores a uniform light reference chart image of the reference chart that has been read in advance by the reading section in a state illuminated by only the uniform light, by controlling the illumination section of the image reading apparatus and the reading section such that an image of the read object is read in a state illuminated by combined light in which the peripheral light and the self-illumination light are combined, and such that a peripheral light standard color chart image of the standard color chart is read in a state illuminated by only the peripheral light when the illumination section is off and peripheral light is illuminated; and (b) correcting the image of the read object based on the self-illuminated reference chart image, the uniform light standard color chart image and the uniform light reference chart image stored in the storage section, and based on the image of the read object and the peripheral light standard color chart image read by the reading section, wherein the standard color chart is used to compute a peripheral light intensity ratio of the peripheral light with respect to the uniform light.