第二步，处理截图。下载下来之后先做去重——用 pHash 算法比较相邻截图的相似度，超过 90% 的跳过，只保留应用切换时的截图。去重后的截图做 OCR 识别。
mandoc - Void Linux, Haiku, others?，更多细节参见体育直播
She explained they could not return home as they had rented out their property, so they have been staying in a friend's flat in Wellington, Shropshire.，这一点在体育直播中也有详细论述
Tuesday evening’s meeting of the Foxborough, Massachusetts, Select Board is still minutes from starting, but a local resident can’t keep himself from approaching the bench. He has an urgent question for the five members, who in effect serve as the town’s primary governing body. His tone isn’t one of anger, more of concern.