Patent ID: 8570617

Claim:
An image reading apparatus, comprising: an image reader that performs an image reading processing of reading a document and generating image data while moving relative to the document in a sub scanning direction; an image adjuster that performs an image adjustment processing using image data generated by reading an adjustment document, which is a document for image adjustment, by the image reading processing performed by the image reader; an instruction receiver that receives an instruction to perform the image adjustment processing; and an execution controller that causes the image reader to perform the image reading processing of reading the adjustment document and generating the image data, and causes the image adjuster to perform the image adjustment processing using the image data generated by the image reading processing when the instruction to perform the image adjustment processing is received by the instruction receiver, wherein the adjustment document includes line images each indicating the same chromaticness in a main scanning direction and arranged in parallel in the sub scanning direction and parameter images provided at a plurality of predetermined positions respectively spaced apart in the main scanning direction in a margin area where the line images are not provided, wherein the parameter images indicate parameters used in a case of performing the image adjustment processing using image data corresponding to positions in the main scanning direction respectively indicated by the plurality of predetermined positions out of image data generated by reading the line images by the image reading processing, and wherein the execution controller causes the image reader to perform the image reading processing of reading the adjustment document, judges whether or not the respective image data generated by reading the line images and corresponding to the plurality of predetermined positions in the main scanning direction coincide with each other, selects any one of the image data judged to coincide out of the respective image data, and causes the image adjuster to perform the image adjustment processing using the selected image data and the parameter indicated by the image data generated by reading the parameter image provided at the position in the main scanning direction of the selected image data.