1. An image-processing device comprising: an image information generating part for dividing an image to be processed into a plurality of small areas and for generating, for each of said small areas, image information indicating a characteristic of the image; an evaluation value determining part for determining an evaluation value according to the image information generated for each of said small areas and to the image information generated for each of small areas adjacent to the each of said small areas, the evaluation value indicating luminosity of each of pixels constituting the image; and an image-processing part for performing an image processing on each of the pixels of the image according to the evaluation value determined by said evaluation value determining part.