咱们先说那 Google 那个看图 OCR 的东西，真不能指望它像人类一样。

那些原始数据跟文字根本对不上拍，它就是个数字玩家，啥都没得。你得得先懂那玩意儿如何学，别光盯着它的准率看，还得看它的边界在哪儿，有时候它瞎过，有时候又特准。 我之前搞个项目，就是要做个词云。

本来打算好办弄弄，结局被 Google 给卡住了。我那项目图里全是乱码，就连还有符号，它都认不全。

这时候我就琢磨，是不是它吃不到味儿？对，就是没数据喂得准。

后来我做了个微调，给它的输入加上了一些特定的标记，效果立马就上去了。

这说明啥？说明它不是天生就啥都会，得有人工去给它找路。 我写那段代码的时候，手都在抖，生怕一个个标签都排错。

有时候模型在选词库里犹豫不决，它看着两个意思相近的词，脑子转了半小时，最终才偷偷溜进去。

这时候得人工干预，手动把那个犹豫的给挑出来。我就连得盯着它的决策逻辑，看看它到底偏向了左边还是右边，别光看结局，得看看它如何想的。

这就是训练的黄金期，也是最费劲的环节。 记得有个时候，模型在识别生僻字上彻底糊了。

那会儿我在做古籍数字化，好多四字成语都变不成字了。我本来当作模型就是个计算器，坏了只会算数。结局它连“山河社稷”这种词都搞不定，只能一个个猜。

后来我绕了个弯，不是去强行让它整，而是让它去学上下文。我把那些整个的句子丢给它，让它自己琢磨哪几个字能活。它学完，能认出“社稷”了，那是真会认了。

这说明啥？说明它不是死记硬背，是懂了逻辑。 故此，别总认定人脑那套规则万能。

有时候规则写得忒死，模型反而得钻牛角尖。我得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得得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