×

Image processing apparatus and method, and profile generating method

  • US 6,859,551 B2
  • Filed: 06/19/2002
  • Issued: 02/22/2005
  • Est. Priority Date: 07/24/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. An image processing method of performing a color matching process, said method comprising:

  • a setting step of setting a mode for color gamut mapping from a plurality of modes, wherein the plurality of modes include a relative mode for performing relative color matching and an absolute mode for performing an absolute color matching;

    a first conversion step of converting input data, which is dependent on a color space of an input device, to first data, which is color space data that is independent of any device;

    a second conversion step of converting the first data to second data in a color perception space, which corresponds to the set mode and is independent of a viewing condition, wherein said second conversion step performs a forward conversion of a color appearance model, based on the set mode and an input viewing condition, on the first data;

    a first calculation step of calculating third data by performing the color gamut mapping, which corresponds to a color reproduction range of an output device, on the second data converted in accordance with the set mode;

    a second calculation step of calculating fourth data in a device independent color space by performing an inverse conversion of the color appearance model, based on the set mode and an output viewing condition; and

    a third conversion step of converting the fourth data into output color space data which is dependent on the output device, wherein the color perception space is a relative color perception space when the relative mode is set, and an absolute color perception space when the absolute mode is set.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×