An image processing apparatus including: an image obtaining unit that obtains low-resolution (LR) images acquired in time series; a position alignment unit that aligns the LR images on the basis of a movement between the LR images to generate a high-resolution (HR) image; a correlation calculating unit that calculates correlation information between areas of the LR images, the areas corresponding to partial area in the HR image; a compositing-ratio calculating unit that calculates, for each partial area, a ratio between the HR image and an image to be composited which is generated from the LR or HR images and has a lower resolution than the HR image, such that the proportion of the HR image becomes smaller as the correlation of the area decreases; and an image compositing unit that composites the HR image and the image to be composited according to the ratio.