1. A moving picture processor, comprising: an evaluator configured to evaluate whether terminal points of motion vectors consecutively detected in a current picture and a reference picture different from the current picture in terms of time are in a determination area having a center at a terminal point of a reference vector; and a unifier configured to unify a group of motion vectors consecutively evaluated to be in the determination area, and to reset a motion vector evaluated to be outside the determination area as the reference vector; wherein the evaluator comprises a reference vector setter configured to set the motion vector evaluated to be outside the determination area as the reference vector; a vector difference calculator configured to execute a difference calculation between the reference vector and the motion vector, and to generate a difference vector; a variable updater configured to decrease or reset a value of a variable based on the difference vector; a determination area setter configured to set the determination area in accordance with the variable; and a first comparator configured to compare the difference vector with the determination area, and to determine whether a terminal point of the difference vector is in the determination area.