1. A color-sample image generator for producing a color sample, comprising: processing circuitry configured to measure lightness of every pixel of a first area of a first image, arrange all the pixels in a second area of a second image that is different from the first area, based on lightness level, and linearly interpolate a group of pixels duplicated from all the pixels, according to a number of pixels of the second area, and arrange the linearly interpolated pixels in the second area.