The Scale-rate as the Measure of Local Complexity of Medical Images

For feature extraction in medical images, the scale-rate is proposed to represent local spatial or temporal complexity in medical images. The scale-rate is applied in automatic echocardiogram analysis. The experimental results show that the proposed method is effective and has promising application in automatic echocardiogram segmentation. Moreover, the directional spatial distribution of the scale-rate in medical images is investigated experimentally. The experimental results indicate that the scale-rate is a feature that represents edge areas in medical images.