Image reading device and image reading method
AssigneeSeiko Epson Corporation
InventorHikari ISHIHARA
Life of this patent
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Abstract
The image reading device includes a light source configured to emit light, a reference portion for shading correction, a reading unit configured to read a document and output read data, and a control unit. One of first black reference data and first white reference data is data that is obtained by reading the reference portion by the reading unit with the light source turned on and that is potentially affected by dirt. The control unit sets a document region based on a first result obtained by executing shading correction based on a difference between the read data and the first black reference data and a difference between the first white reference data and the first black reference data.
Claims11
An image reading device comprising:
- a light source configured to emit light;
- a reference portion for shading correction;
- a reading unit configured to read a document and output read data;
- and
- a control unit, wherein
- one of first black reference data and first white reference data is data that is obtained by reading the reference portion by the reading unit with the light source turned on and that is potentially affected by dirt and
- the control unit sets a document region based on a first result obtained by executing shading correction based on a difference between the read data and the first black reference data and a difference between the first white reference data and the first black reference data.
An image reading method for an image reading device including a light source that emits light, a reference portion for shading correction, and a reading unit that reads a document and outputs read data, wherein
- one of first black reference data and first white reference data is data that is obtained by reading the reference portion by the reading unit with the light source turned on and that is potentially affected by dirt and
- a document region is set based on a first result obtained by executing shading correction based on a difference between the read data and the first black reference data and a difference between the first white reference data and the first black reference data.
Dependencies are inferred from the claim text.