An image motion detecting circuit and an image motion detecting method of the
present invention can accurately detect motion of such an image sequence that different
still pictures are connected with each other. Inter-frame difference absolute values
of an inputted image signal during a predetermined frame period are held by plural
registers 105. Then, the maximum value is extracted from the inter-frame
difference absolute values which are held by the plural registers 105, and
the extracted maximum value is subtracted from the sum of the inter-frame difference
absolute values during the predetermined frame period, thereby detecting the motion
of the whole image sequence.
