APPARATUS FOR DISPLAYING TONE CURVE AND APPARATUS FOR ADJUSTING TONE CURVE

An image for adjusting a tone curve includes an overall tone curve image including a tone curve of dot gains in a predetermined full scale with respect to all input image gradation values of image data, and an enlarged tone curve image including a tone curve of enlarged dot gains in a full scale, smaller than the predetermined full scale, which represent a highlight area of gradations which is part of the entire tone curve. The user can finely adjust and correct the tone curve in the highlight area while viewing the overall tone curve.