1. An image processing device comprising: a focus area setting section for setting each of a plurality of areas that are to be kept in focus in a captured image of a subject as a focus area; a depth acquisition section for acquiring a depth of the subject in relation to each pixel in the image; and a blur processing section for setting each pixel in the image as a target pixel and for performing a blur process on the target pixel in accordance with a minimum value of each depth difference absolute value between depth corresponding to the target pixel and depth corresponding to each of the focus area.