In a chart for color calibration which is output and calorimetrically measured for color calibration of a printer device, respective charts of a color chart are arranged obliquely with respect to the alignment direction of grid points in a printer device color space or in a state that a plane in which charts are arranged on grid points and a plane in which charts are not arranged on grid points are alternately combined, on a color space of the color chart. With this configuration, a novel chart for color calibration which assures higher accuracy despite having a smaller number of steps (number of charts), and an image processing method and image processing apparatus using the chart are provided.