An image processor includes an image processing section, an enlargement processing section, and a controller. When image data including a second predetermined number of pixels to be output from an image output section, is generated on the basis of image data including a first predetermined number of pixels smaller than the second predetermined number input to an image data input unit, the controller controls the enlargement processing section to generate image data including a third predetermined number of pixels larger than the first predetermined number and smaller than the second predetermined number. The controller controls the image processing section to apply image processing to the image data including the third predetermined number of pixels. The controller also controls the enlargement processing section to generate the image data including the second predetermined number of pixels on the basis of the image data including the third predetermined number of pixels.