title = extract_text(soup.select_one("h1"))
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.。业内人士推荐91视频作为进阶阅读
。关于这个话题，im钱包官方下载提供了深入分析
Фото: Кристина Кормилицына / Фотохост-агентство РИА Новости
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