Soften the shadow by adding Gaussian Blur filter.

柔化阴影，加入高斯模糊滤镜。

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Click on “Filter,” “Add Noise” and set noise to 1%, “Gaussian” and “Monochromatic.”

在“滤镜”“增加噪点”上点击，把噪点设置成1%，设置“高斯”和“单色”。

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As a result, the experiment shows that the algorithm can effectively filter out Gaussian and impulse noises, as well as preserve more detailed information of the original image.

实验结果表明，与传统的中值滤波和均值滤波算法相比，该算法能够有效地去除高斯和脉冲噪声，同时能够保留更多的图像细节信息。

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The first filter that is applied to the height map is a simple Gaussian blur, which the GPU handles with ease, but which -- if left to its own devices -- would simply smooth out all the dramatic extremes in the height map and leave us with a bunch of bland rolling hills.

ENGADGET: Primed: The crazy science of GPU compute Mobile