Patent ID: 8310741
Filing Date: 2012-11-13
Classification: H04N

Abstract:
1. An image reading device comprising: a light source; an image reading unit including a photoelectric conversion element that reads an image illuminated by the light source; a drive control unit configured to drive the image reading unit; a white reference member arranged at a position which allows the image reading unit to perform image reading; a chromaticity detecting unit configured to detect chromaticity of an image of the white reference member read by the image reading unit; a reference value storage unit configured to store a first reference value representing chromaticity of the image of the white reference member read by the image reading unit and a second reference value representing luminous intensity of the light source at a predetermined normal temperature; a chromaticity change calculating unit configured to calculate the amount of chromaticity change between the chromaticity represented by the first reference value stored in the reference value storage unit and the chromaticity detected by the chromaticity detecting unit during operation of the image reading unit; and a control unit configured to control an operation of the image reading device according to the amount of chromaticity change calculated by the chromaticity change calculating unit, wherein the control unit comprises: