It is possible to provide an image processing device, a method, and a program which can prevent image degradation which occurs when modifying the image magnification. The image processing device includes: an image input unit (10) which performs an image input; an edge direction calculation unit (24) which detects the edge direction contained in an image inputted by the image input unit (10); and an interpolation position decision unit (26), an interpolation object pixel decision unit (28), a first direction interpolation unit (30), and a second direction interpolation unit (32) which perform an interpolation process in the edge direction detected by the edge direction calculation unit (24) on the image inputted by the image input unit (10).