2984 is probably the first "modern" ATM, but since IBM spent 4-5 years
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.，推荐阅读safew官方版本下载获取更多信息
On top of that, we can get two full pixels of color using foreground and background colors. If we render an upper block with a foreground color of cyan and a background color of red, we get a cyan pixel sitting on top of a red pixel!，推荐阅读旺商聊官方下载获取更多信息
* @param low 起始索引