Patent ID: 8593571

Claim:
An image processing apparatus which detects a second image frame group, of which frame rate is converted from a source rate of a first image frame group, that is an m number of frames per predetermined time, into an n (n<m) number of frames per same predetermined time by skipping frames from the first image frame group, comprising: a first motion vector calculation unit to determine a first motion vector, which is a motion vector between one image frame and an image frame immediately before this one image frame in the second image frame group; a second motion vector calculation unit to determine, as a second motion vector, a motion vector between one image frame and an image frame which is n frames before this one image frame in the second image frame group; and a detection unit to detect that the second image frame group is obtained from the first image frame group by the frame conversion, when the ratio of the first motion vector and the second motion vector is in a range recognized as a predetermined ratio which is determined by the number of frames m and a frame skip pattern.