average filter的意思|示意

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Average filters are one of the most useful tools available in the field of digital image processing. They are commonly used to reduce the noise in an image, by taking the average of the neighboring pixels values.

Average filters can be applied to an image or selection in the form of a square, rectangular or circular region. By default, Photoshop allows you to select a square or rectangular region, with the radius of the circle being dependent on the size of the selection.

When an average filter is applied to a region, the filter takes the average of all the pixels in that region, including the pixel in the center, and applies it to the entire region. This results in the elimination of speckles and other random noise.

There are a few drawbacks to average filters. They tend to blur the edges of objects, as the average pixel values of the edges may be different from the median. This can be addressed by using other types of filters, such as median filters or edge-preserving filters. Additionally, average filters can introduce artifacts into the image.

In conclusion, average filters are a useful tool for reducing noise in digital images. They are simple to apply and often provide good results. However, they should be used in combination with other filters and techniques to achieve the desired effect, and to reduce potential artifacts.