Patent ID: 7777780

Claim:
An image motion detection apparatus comprising: an image display device which displays a moving image; a period designation device which designates, in accordance with user operation, a first period in which motion is present in the moving image displayed by said image display device and a second period in which no motion is present; an upper/lower limit value determination device which determines an upper limit value and a lower limit value of a threshold value on the basis of a change amount in the moving image during the first period with respect to a predetermined reference image and a change amount in the moving image during the second period with respect to the predetermined reference image; a threshold value determination device which determines an arbitrary threshold value in accordance with user operation within a range from the upper limit value to the lower limit value of the threshold value, which are determined by said upper/lower limit value determination device; and a motion detection device which detects motion in the moving image on the basis of the threshold value determined by said threshold value determination device and the change amount in the moving image with respect to the predetermined reference image.