Patent ID: 9277080
Filing Date: 2016-03-01
CPC Classification: H04N

Claim Text:
1. An image reading device comprising: a reading unit configured to output image data by reading an original document, the reading unit having a light source and a light receiving unit, the light source being configured to emit light, the light receiving unit being configured to receive light; a command receiving unit configured to receive an instruction to control the reading unit to read the original document; a storing device preliminarily storing reference dark output data and reference correction data assigned with the reference dark output data, the reference dark output data being generated based on read dark data outputted from the light receiving unit while the light source does not emit light; a reference member; and a control device, after the command receiving unit receives the instruction, configured to: generate dark output data based on read data outputted from the light receiving unit while the light source does not emit light; and determine whether the dark output data is within a first prescribed range into which the reference dark output data falls, wherein when determining that the dark output data is within the first prescribed range, the control device is further configured to: generate the image data by using the reading unit; and correct the generated image data by using the reference correction data preliminarily stored in the storing device, wherein when determining that the dark output data is not within the first prescribed range, the control device is further configured to: generate light output data based on read light data obtained from the light receiving unit by reading the reference member while the light source emits light; generate new correction data based on the generated dark output data and the generated light output data; generate the image data; and correct the generated image data by using the newly generated correction data.