Title:
対数ルックアップテーブルを用いた任意の冪乗関数
Document Type and Number:
Japanese Patent JP2010517435
Kind Code:
A
Abstract:
A display device performs the fractional part of gamma translation by using a logarithm lookup table. The logarithm of an image data value is found in a look-up table (104). The retrieved result is multiplied by the fractional portion of the power, and a search in the look up table (104) for this product produces an index related to the desired result. In another embodiment, rather than a search of the first look up table (112), a second inverse logarithm look up table (114) is used to produce the desired result by looking up the exponentiation of the product.
Inventors:
Michael H. Anderson
Application Number:
JP2009547372A
Publication Date:
May 20, 2010
Filing Date:
January 21, 2008
Export Citation:
Assignee:
Qualcomm Mems Technologies Incorporated
International Classes:
H04N5/202; G06T5/00; G09G5/00; G09G5/36; H04N1/407
Domestic Patent References:
| JP2001005643A | 2001-01-12 | |||
| JPH10207694A | 1998-08-07 | |||
| JPH0583597A | 1993-04-02 | |||
| JP2001103504A | 2001-04-13 |
Attorney, Agent or Firm:
Yasuhiko Murayama
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro