Patent ID: 7136187
Filing Date: 2006-11-14
Classification: H04N

Abstract:
1. A color correction method comprising: a color correction conversion definition producing step including a first partial step of obtaining image data outputted from an input device for receiving an original image and outputting the image data representative of a received image which is subjected to a color correction for the original image, a second partial conversion step of converting the image data obtained by said first partial step into coordinate values of a colorimetry color space describing a measured value of a color, corresponding to a color of an image obtained when the image based on the obtained image data is outputted from an output device for outputting the image based on the image data, in accordance with characteristics of an image output of the output device, and a third partial step for obtaining the coordinate values of the colorimetry color space corresponding to the color of the original image, whereby said color correction conversion definition producing step produces a color correction conversion definition defining an association between coordinate values of the colorimetry color space corresponding to colors before and after the color correction; a first device conversion step of using a conversion definition according to characteristics of image receipt or image output by a first device for receiving an image to obtain image data or outputting an image based on image data, to convert coordinate values in a first color space describing image data for the first device into coordinate values of the colorimetry color space independent of the device; a color correction conversion step of using the color correction conversion definition produced in said color correction conversion definition producing step to convert coordinate values of the colorimetry color space corresponding to colors before the color correction into coordinate values of the colorimetry color space corresponding to colors after the color correction; and a second device conversion step of using a conversion definition according to characteristics of image receipt or image output by a second device for receiving an image to obtain image data or outputting an image based on image data, to convert coordinate values of the colorimetry color space into coordinate values in a second color space describing image data for the second device, whereby the image data defined by the first color space is converted into image data defined by the second color space, said image data being representative of an image in which the color correction is applied to an image based on the image data defined by the first color space.