Abstract: In a method for color adjustment of a color image, a color adjustment software window is displayed and color image data on an RGB color space before color adjustment is displayed on a before-adjustment image window of a color monitor screen. An operator for color adjustment designates a color on the before-adjustment image window (or a designated color) and sets an adjustment color for the designated color (or a designated adjustment color). The designated adjustment color is set from a color pallet or by changing the R, G and B levels of a designated-color window and color adjustment parameters for the designated color are determined from the designated color and the designated adjustment color.

Abstract: In a color correcting apparatus, transformation errors in an entire color space can be uniformly reduced in response to a characteristic of an input/output appliance, and a high precision color correction can be achieved. A first reference table is formed by storing input color signals produced by reading a reference color chip by using a color image scanner in correspondence with measurement values produced by measuring the reference color chip by employing a calorimeter. A calculation is made of a transformation coefficient for transforming input color signals into measurement values based on the input color signals close to lattice points defined in a color space, and also the measurement values corresponding thereto. The color data of the respective lattice points are corrected by using the transformation coefficient. Then, a second reference table is formed by storing the color data of the lattice points in correspondence with the corrected color data of the lattice points.