Image processing apparatus and image processing method

Patent metadata

Field	Value
Publication number	US-8970920-B2
Application number	US-201314090409-A
Country	US
Kind code	B2
Filing date	Nov 26, 2013
Priority date	Dec 18, 2012
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

The apparatus of the present invention totalizes a frequency distribution while switching frequency distributions as targets, for each region having a set width, by using a sensor which captures document image data and a setting unit which sets a region width in accordance with frequency distribution generation targets. Upon detecting the trailing end of the document, the apparatus decides a remainder region which is not a totalization target in accordance with the remaining amount of image data of the document, and does not totalize any frequency distribution in the remainder region.

First claim

What is claimed is:

1. An image processing apparatus comprising:
a reading unit configured to read a document from an end portion of the document for each line in a predetermined direction and output image data;
a detection unit configured to detect a size of the document in the predetermined direction;
an obtainment unit configured to obtain a frequency distribution of pixel values by using output image data, for each reference region having a predetermined width in the prede…

Assignees

• Canon Kk

Inventors

• Nakamura Yasuyuki

Classifications

• H04N1/047 Primary

  Electricity · mapped topic

• H04N1/121

  Electricity · mapped topic

• H04N1/4074 Primary

  Electricity · mapped topic

• H04N1/0071

  Electricity · mapped topic

• H04N2201/0081

  Electricity · mapped topic