An image processing device according to the present invention uses a representative picture having a first resolution and multiple reference pictures having the first resolution to generate a high-resolution picture having a second resolution higher than the first resolution. The image processing device includes a first repetition processing unit operable to repeat positioning processing while switching from one reference picture to another, and a second repetition processing unit operable to repeat update processing for updating an estimated value of a pixel in a target high-resolution picture. At least one of the first and second repetition processing units includes a determination unit operable to determine a pixel that satisfies a completion condition from the result of one of the positioning processing and the update processing, and an exclusion unit operable to exclude a pixel that satisfies the completion condition from one of the positioning processing and the update processing.