1. An image processing apparatus which processes image data corresponding to a display image, the image processing apparatus comprising: an input section which is configured to input at least image data corresponding to an image having a reference resolution P which is a resolution as a reference, the resolution representing the number of constituent pixels; M image processing sections which have a function of processing image data of M (where M is an integer equal to or greater than 2) images segmented from the image having the reference resolution P; an image processing control section which, when an image corresponding to input image data is the image having the reference resolution P, causes the M image processing sections to process image data corresponding to the M partial images segmented from image data and, when an image corresponding to input image data is an image which has a resolution Q lower than the reference resolution P and is of size to be processable by N (where N is an integer equal to or smaller than M−1) image processing sections, causes L image processing sections from among the M image processing sections to process image data corresponding to L (where L is an integer equal to or greater than N+1 and equal to or smaller than M) partial images segmented from image data; and an image composition section which reconstructs the display image on the basis of image data corresponding to the partial images subjected to image processing by the M or L image processing sections.