Title:
画像強調装置
Document Type and Number:
Japanese Patent JP5753437
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an image processor which avoids crushing the fine gradation of an image and erroneously enhancing noise.SOLUTION: An image processor 100, which receives a luminance signal of an image, performs contour enhancement of the signal, and outputs the signal comprises a low-luminance noise suppression processing circuit 140, a contour detection circuit 150, and a nonlinear processing circuit 160. The low-luminance noise suppression processing circuit 140 reduces a luminance value received from a line memory 110 using a predetermined function, and outputs the luminance value. The contour detection circuit 150 detects contour information of a subject image from the luminance value on the basis of the positional relation between a target pixel and a peripheral pixel. The nonlinear processing circuit 160 performs core ring processing on a contour information amount Y(x,y) received from the contour detection circuit 150.
Inventors:
Kingship
Kazuo Tanaka
Naoshi Mizuguchi
Katsuya Tanuchi
Kazuo Tanaka
Naoshi Mizuguchi
Katsuya Tanuchi
Application Number:
JP2011101485A
Publication Date:
July 22, 2015
Filing Date:
April 28, 2011
Export Citation:
Assignee:
HOYA CORPORATION
International Classes:
H04N5/208; G06T5/00
Domestic Patent References:
| JP2653800B2 | ||||
| JP2002314814A | ||||
| JP4010774A |
Attorney, Agent or Firm:
Takashi Matsuura
Hiroki Ogura
Shigeru Torayama
Takuya Fuji
Hiroki Ogura
Shigeru Torayama
Takuya Fuji