Patents Represented by Law Firm Frishauf, Hotz, Goodman, Langer & Chick
  • Patent number: 5446504
    Abstract: An input section receives an image signal including signals related to colors to output at least a luminance signal component of the image signal. A compressing section compresses the dynamic range of the luminance signal component from the input section. A setting section obtains a compression coefficient from a relationship between the luminance signal component whose dynamic range is compressed by the compressing section and the luminance signal component from the input section. An operating section executes an operation for compressing dynamic ranges of the signals related to colors included in the image signal in accordance with the compression coefficient obtained by the setting section. A correcting section substantially corrects the color saturation of the signals related to a color included in the image signal while preserving the luminance of the image signal such that the color saturation is more intensively suppressed as the luminance becomes lower.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: August 29, 1995
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Tohru Wada