An image processing device includes first image processing part, and first image processing part includes first pixel group setting part that sets plurality of first pixel groups which is set to correspond to first pixel, and which is disposed along in plurality of directions that form plurality of angles different from each other with respect to predetermined direction in first image or which is disposed along in predetermined direction in each of plurality of images obtained by moving first image by plurality of angles different from each other with respect to predetermined direction, first calculation part configured to calculate plurality of first candidate pixel values based on size of pixel value of pixel included in each of plurality of first pixel groups, and first pixel value setting part that sets pixel value of second pixel of second image based on plurality of first candidate pixel values.