Title:
画像表示装置、および画像表示方法
Document Type and Number:
Japanese Patent JP4463705
Kind Code:
B2
Abstract:
A tone step detector detects whether the tone of n-bit input image data varies gradually, and generates a tone processing control signal indicating that a tone step is contained. A bit shifter bit-shifts the n-bit input image data to the left by alpha bits, to generate (n+alpha)-bit image data. A tone processor smoothes the image data of the (n+alpha)-bit image data generated by the bit shifter, in the region where the tone processing control signal indicates that a tone step is contained, to generate (n+alpha)-bit image data having been smoothed in the above-mentioned region. Because of the selective smoothing, degradation in the image quality due to quantization is reduced even when an analog image signal whose tone varies gradually is input.
Inventors:
Satoshi Yamanaka
Yoshiaki Okuno
Jun Someya
Yoshiaki Okuno
Jun Someya
Application Number:
JP2005055729A
Publication Date:
May 19, 2010
Filing Date:
March 01, 2005
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H04N1/407; G06T5/00; G06T5/20; G09G3/20; G09G5/36; H04N1/409; H04N5/20
Domestic Patent References:
| JP2002112038A | ||||
| JP2004301976A | ||||
| JP10155089A | ||||
| JP11355561A | ||||
| JP8237669A | ||||
| JP10173488A |
Foreign References:
| WO2003065293A1 |
Attorney, Agent or Firm:
Minoru Maeda
Youichi Yamagata
Masahiko Shinohara
Youichi Yamagata
Masahiko Shinohara