1. An image processing apparatus comprising: an image information obtaining unit that obtains image information regarding a process target image on which image processing for adjusting an impression of an image to an impression of a sample image is performed, and image information regarding the sample image; a feature value extraction unit that extracts feature values of the process target image and feature values of the sample image; an image adjustment unit that adjusts the feature values of the process target image to the feature values of the sample image; and an image display unit that temporarily displays, on the process target image, an image obtained by adjusting the feature values of the process target image to the feature values of the sample image, within a predetermined area in response to a first operation that is performed by a user on the process target image, and thereafter displays an entire image obtained after image processing in response to a second operation that is performed by the user on the process target image.