Patent ID: 8634590

Claim:
An image processing device comprising: a memory configured to store computer readable instructions; and a processor configured to execute the instructions that cause the processor to implement a process comprising: identifying a plurality of reference frame images from a motion image configured of a plurality of frame images that are chronologically in succession with one another, the reference frame images comprising a first frame image positioned at the beginning of the motion image, a last frame image positioned at the end of the motion image and at least one middle frame image distributed at a substantially equi-interval between the first frame image and the last frame image in the motion image; setting a plurality of extraction target ranges in the motion image, each extraction target range being configured of a group of frame images that are selected from among the plurality of frame images constituting the motion image and that are chronologically in succession with one another, and the plurality of extraction target ranges being set such that there is no common frame image shared among the extraction target ranges and such that each reference frame image is included in each extraction target range, the middle frame images identified as the reference frame images being positioned chronologically at a substantially center of the group of frame images in the corresponding extraction target ranges; selecting a representative frame image from among the group of frame images in each extraction target range, the representative frame image being such a frame image whose difference from another representative frame image is the largest among differences of the frame images belonging to the extraction target range from the another representative frame image, the another representative frame image being selected from one of the extraction target ranges that is positioned chronologically adjacent to the extraction target range from which the representative frame image is selected; and generating a layout image in which the selected representative frame images are laid out in such a pattern that indicates a chronological relationship among the representative frame images.