Patent ID: 7925054

Claim:
A motion detection apparatus, comprising: a video signal; a frame delay unit which delays the video signal by one frame; a subtractor which outputs a difference between the video signal and the video signal which is delayed in the frame delay unit; a first vertical frequency filter which separates and outputs, from a signal output from the subtractor, a predetermined frequency band with respect to a vertical direction of a frame of the video signal; a second vertical frequency filter which separates and outputs, from a signal output from the subtractor, a frequency band which is lower than the predetermined frequency band of the first vertical frequency filter with respect to the vertical direction of a frame of the video signal; a first horizontal low pass filter which separates and outputs, from a signal output from the first vertical frequency filter, a predetermined frequency band with respect to a horizontal direction of a frame of the video signal; a second horizontal low pass filter which separates and outputs, from a signal output from the second vertical frequency filter, a frequency band which is broader than the predetermined frequency band of the first horizontal low pass filter with respect to the horizontal direction of a frame of the video signal; and a combiner unit which combines the signal output from the first horizontal low pass filter and the signal output from the second horizontal low pass filter and outputs a combined signal.