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US 2003/0214680 A1Published application
Image reading apparatus, control method therefor, and program
AssigneeCanon Kabushiki Kaisha
InventorsMitsuhiro Sugeta, Kenji Hiromatsu
Life of this patent
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AssigneeCanon Kabushiki Kaisha
InventorsMitsuhiro Sugeta, Kenji Hiromatsu
Estimating the term…
An object of this invention is to suppress a decrease in reading efficiency while preventing image degradation. To achieve this object, an image reading apparatus includes a light source which illuminates an object, a sensor which photoelectrically converts light reflected by the object and reads information on the object, a first density reference member which serves as a reference for correcting an image signal obtained by reading an original by the sensor, a second density reference member which is different from the first density reference member, a comparison unit which compares the second signal obtained by reading the second density reference member by the sensor and the third signal obtained by reading again the second density reference member by the sensor, and a correction unit which corrects the image signal on the basis of the first signal obtained by reading the first density reference member by the sensor, and the comparison result of the comparison device.
An image reading apparatus comprising:
An image reading apparatus control method of controlling an image reading apparatus having a light source which illuminates an object, a reading device which photoelectrically converts light reflected by the object and reads information on the object, a density reference member which serves as a reference for correcting an image signal obtained by reading an original by the reading device, and a roller member which feeds the original to a reading position, comprising:
A program which causes a computer to execute an image reading apparatus control method of controlling an image reading apparatus having a light source which illuminates an object, a reading device which photoelectrically converts light reflected by the object and reads information on the object, a density reference member which serves as a reference for correcting an image signal obtained by reading an original by the reading device, and a roller member which feeds the original to a reading position, comprising:
Dependencies are inferred from the claim text.