Title:
画像処理装置
Document Type and Number:
Japanese Patent JP5455798
Kind Code:
B2
Abstract:
An image processing apparatus includes a first noise removal unit which removes noise from a pixel signal when a level of the signal falls outside a range defined by first and second threshold levels, a cyclic calculation unit which makes a cyclic calculation based on weighted averaging between signals on an identical column with respect to the signal in which the noise is removed by the first noise removal unit, a column offset detection unit which detects a column offset component for each column based on the calculation result, and a second noise removal unit which performs a noise removal operation with respect to a signal on the identical column using the previously calculated cyclic calculation result when a difference between the previously calculated cyclic calculation value and the current pixel signal value falls outside a range defined by third and fourth threshold levels.
Inventors:
Makoto Ise
Application Number:
JP2010131510A
Publication Date:
March 26, 2014
Filing Date:
June 08, 2010
Export Citation:
Assignee:
Canon Inc
International Classes:
H04N5/357; H04N5/374
Domestic Patent References:
| JP2007028521A | ||||
| JP2006025148A | ||||
| JP2006094474A | ||||
| JP2005176061A | ||||
| JP2007300179A | ||||
| JP2007028026A |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu