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Image Synthesis – Noise Generation

十二月 12, 2004

Image Synthesis – Noise Generation

相當不錯的影像處理教學網頁,如果早些時候讓我發現的話,DIP的作業也許就輕鬆多了… 😛

In many cases, additive noise is evenly distributed over the frequency domain (i.e. white noise), whereas an image contains mostly low frequency information. Hence, the noise is dominant for high frequencies and its effects can be reduced using some kind of lowpass filter. This can be done either with a frequency filter or with a spatial filter. (Often a spatial filter is preferable, as it is computationally less expensive than a frequency filter.)

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