所以我期待着一系列不同尺寸和纵横比的照片。我希望能够收缩/拉伸照片，使其尽可能适合200x100的矩形，然后裁剪不适合的部分。我希望作物也能在中心附近生长。这可能吗？我对imagemagick文档很困惑。
谢谢
Paperclip的#选项将完全符合您的要求：将图像最大限度地拟合在指定的尺寸内，然后在中心用重力裁剪多余的部分。
实例
has_attached_file :photo,
:styles => {
:original => "200x100#"
}
注意：如果您想保持原始拇指的完整性并生成一个额外的裁剪拇指，只需将：original键更改为其他键，如：thumb。
参考：http://rdoc.info/github/thoughtbot/paperclip/Paperclip/ClassMethods一
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