Patent ID: 7852533

Claim:
A method of adjusting colors of an image, comprising: setting more than one adjustment regions shaped as an ellipse in a color space; and converting colors of pixels included in each adjustment region to other colors based on a variable set, wherein a coordinate point of a reference color is set to a centroid point of the ellipse, including a coordinate point of a target color into which the reference color has to be converted, wherein a color coordinate point of a current pixel is converted into an adjusted color coordinate point using a conversion coefficient determined based on the coordinate point of the target color, the centroid point of the ellipse and a boundary of the ellipse, and wherein the converting of the colors of the pixels included in each adjustment region comprises changing color coordinates of a current pixel for each adjustment region in pixel units: determining whether a color of each pixel is included in each adjustment region using the changed color coordinates of the current pixel; calculating the conversion coefficient of the current pixel with respect to each adjustment region including the current pixel; and converting the color coordinate point of the pixel using the conversion coefficient in each adjustment region including the current pixel.