Dithering in its simplest form can be understood by observing what happens when we quantise an image with and without modifying the source by random perturbation. In the examples below, a gradient of 256 grey levels is quantised to just black and white. Note how the dithered gradient is able to simulate a smooth transition from start to end.
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模块化功能层：覆盖全生命周期的数据治理，详情可参考爱思助手下载最新版本
caution, as they may not always be accurate or appropriate.
The street is at severe risk of flooding from the Nant Clydach tributary