Abnormal reflected light resistant image reading

Patent metadata

Field	Value
Publication number	US-9106783-B2
Application number	US-201414192901-A
Country	US
Kind code	B2
Filing date	Feb 28, 2014
Priority date	Feb 28, 2013
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

An image reading apparatus includes a light emitting diode (LED), a carriage, light receiving elements, a clamp circuit, an A/D convertor, and an image correction unit. The image correction unit is configured to: detect a document area where the reflected light is abnormal by comparing first image data with second image data; and replace the first image data corresponding to the abnormal document area with third image data. The first image data is generated by movement of the carriage in a sub-scanning direction of a first direction. The second image data is generated by movement of the carriage in the sub-scanning direction of a second direction at a reduced luminescence level of the capturing light illuminated on the document compared with a luminescence level in the movement of the carriage in the first direction. The third image data is the second image data where at least brightness is adjusted.

First claim

What is claimed is:

1. An image reading apparatus, comprising:
a light emitting diode (LED) configured to direct capturing light onto a document;
a carriage configured to receive reflected light of the capturing light reflected by the document, the carriage being configured to move back and forth along a sub-scanning path;
light receiving elements linearly arranged so as to read an image from the document by moving the carriage along the sub-scanning path while receiving the r…

Assignees

• Kyocera Document Solutions Inc

Inventors

• Sayama Haruki

Classifications

• H04N1/1017

  Electricity · mapped topic

• H04N1/02815 Primary

  Electricity · mapped topic

• H04N1/00005

  Electricity · mapped topic

• H04N1/40056

  Electricity · mapped topic

• H04N1/02885

  Electricity · mapped topic