Provided is an image analysis unit that receives an image to be a down-conversion processing target as an input and generate adjacent pixel difference information used to select a pixel to be output to a down-converted image, and an output image generation unit that selects a pixel pair to be an adjacent pixel used for the down-converted image on the basis of the adjacent pixel difference information and generate the down-converted image by executing an adjustment of the selected pixel pair. The image analysis unit calculates a difference of an adjacent pixel pair of a processing block constituent pixel, generates a sorting result of arranging the differences in descending order, and the output image generation unit selects the pixel pair to be used for the down-converted image in descending order of difference values on the basis of the sorting result.