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<title>饱和度</title>
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<h2 class="pHeading2">
饱和度
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<p class="pBody">
是指某特定色调（颜色）的强度。高度饱和的色调非常鲜明和强烈，而饱和度较低的色调则显得较灰暗。完全不饱和的颜色呈灰色。就 RGB 颜色模型而言，当三个通道之一（假定为红色）的亮度达到 100%，而其它两个通道（绿色和蓝色）亮度为 0% 时，则会出现完全饱和的颜色。反之，所有的颜色值相同时，则出现完全不饱和的颜色。因此，可以将饱和度理解为通道值之间的相对差异。
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