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本文针对影响医学超声图象质量的斑点噪声问题，提出了一种基于自适应前处理的多尺度非线性阈值斑点噪声抑制方法。方法的特点是有机地将自适应加权中值滤波和小波分析多尺度非线性阈值两种方法结合在一起．对离体器官超声图象处理的结果表明，这一新方法在有效去除斑点噪声的同时，很好地保留了图象细节。
In this paper, aiming at the speckle noise which affects the image quality of medical ultrasound, a new adaptive threshold suppression method based on adaptive preprocessing is proposed. The method is characterized by organic combination of adaptive weighted median filtering and wavelet analysis of multi-scale nonlinear threshold. The results of the ultrasonic image processing of isolated organs show that this new method preserves the image details well while removing speckle noise effectively.