Spectrogram Enhancement We apply spectrogram enhancement techniques to further reduce noise. Insight:CSI spectrograms give similar information as the expensive Doppler radars Leg 80 Cycle time reflection Torso 60 reflection 40 20 2 3 4 5 Time(seconds) 11/9611/96 Spectrogram Enhancement § We apply spectrogram enhancement techniques to further reduce noise. § Insight: CSI spectrograms give similar information as the expensive Doppler radars