现在公司有个项目是让用户上传图片，然后查看图片的，有些类似百度云吧。然后有个需求要查看图片时先看缩略图，点击原图才能看原图，我看到微博都有这个功能，我想知道他们这个功能是怎么做到的，是上传的时候直接压缩了几个版本的图片，还是前端加载的时候才临时压缩的？
我比较想要一个静态服务器在输出图片的时候自动压缩图片，就像下面文章里提到的七牛做到的那样，功能没有七牛的强也行，只要简单的按图片比例压缩图片就行，但压缩得要好，我用过一些压缩，压出来的图片锐度特别高，锯齿挺严重。
看了这篇文章Web性能优化：图片优化，觉得还是有帮助的，他提到的Google PageSpeed，可以部署到Apache服务器上，获取图片的时候会自动压缩，似乎挺适合。但是我搜了一下，发现这个只是检测服务器性能的工具而已，不是用来压缩图片的？
回复内容：
现在公司有个项目是让用户上传图片，然后查看图片的，有些类似百度云吧。然后有个需求要查看图片时先看缩略图，点击原图才能看原图，我看到微博都有这个功能，我想知道他们这个功能是怎么做到的，是上传的时候直接压缩了几个版本的图片，还是前端加载的时候才临时压缩的？
我比较想要一个静态服务器在输出图片的时候自动压缩图片，就像下面文章里提到的七牛做到的那样，功能没有七牛的强也行，只要简单的按图片比例压缩图片就行，但压缩得要好，我用过一些压缩，压出来的图片锐度特别高，锯齿挺严重。
看了这篇文章Web性能优化：图片优化，觉得还是有帮助的，他提到的Google PageSpeed，可以部署到Apache服务器上，获取图片的时候会自动压缩，似乎挺适合。但是我搜了一下，发现这个只是检测服务器性能的工具而已，不是用来压缩图片的？
大量图片是上传的时候直接压缩了几个版本（通过队列任务压缩，防止占用过多资源）
压缩的实现方案就很多啦，github一堆
静态文件就不要走PHP了，走nginx
关于图片裁剪，nginx有插件可以做c语音的插件，速度绝对杠杠的，比PHP快得多了
你可以用php动态生成缩略图 只有访问的时候生成一次 之后走静态文件 这个nginx可以配置的
至于图像质量 在php的生态圈主要靠扩展 gd imagick 后者一般说质量相对好些 关于锐度问题应该是调用库的参数不合理 建议静下心来多试试看
是否可以在上传的时候，直接程序压缩一下，存储一张缩略图，展现的时候直接调用缩略图，鼠标点击的时候直接放出大图片的地址，就能解决问题了。不用存储数据库按照一定规则存储到本地，获取的时候组装即可。
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