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.
Discovered in Northamptonshire, Machin says it could have belonged to an active or former Roman gladiator, or even be a spectator's souvenir, even though there is no evidence of an arena or circus space in that part of the country.
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如果将 iPhone 发布的 2007 年视为智能手机的元年，那么到今天，已经狂奔了近二十年。
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I didn't spot this by myself. A reader first tipped me off to the similarities between the U24 …