数字图像的强度和像素结构具有一些自然的数据模式。
Digital images have natural statistical patterns in the intensity and texture of their pixels.
在这个例子中，我们将针对一副数字图像的像素平均色值创建函数索引。
In this example, we create functional indexes on the average color values of the pixels in a digital image.
由于各种原因，数字摄像机会产生噪声，所以在帧之间像素很难维持完全一样的颜色值。
Due to various issues with digital cameras involving noise, pixels will rarely maintain their exact color value between frames.
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