diffusion of the point image 点象模糊 ; 像点扩散
To solve the problem of the poor gray level of SMPDP, the multi-frame combination and error diffusion methods are used. The image quality is improved greatly.
采用多帧图像的叠加显示和误差扩散方法，很好地解决图像灰度级不足的问题，从而提高荫罩式等离子体显示器的图像质量。
Partial differential diffusion equation is used to remove the noise of medical ultrasonic image.
研究了偏微分扩散方程在医学超声图像去噪中的应用。
To preserve image features, the nonlinear diffusion coefficients are locally adjusted according to the directional derivatives of the image.
而且为了保持图像特征，利用图像的方向导数局部地调整非线性扩散系数。
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