根据核医学图像的特点，给出了核医学图像的平滑对比度拉伸处理算法。
According to the characteristics of nuclear medical image, a contrast stretching algorithm of smoothed image is provided.
通过灰度拉伸增强图像对比度，通过二值化处理实现图像中背景和对象的分割。
The contrast of the image was enhanced by gray expanding and the key threshold of the binarization algorithm was determined based on the dynamical threshold method.
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