图像和其他静态内容不会通过TT，因此我们会配置Plack： Middleware： Static，通过特定的扩展名直接提供文件。
Images and other static content should not go through TT, so we are going to configure Plack: : Middleware: : static to serve files directly with specific extensions.
基于内容的图像检索是根据描述图像视觉内容的特征向量进行相似性检索，其中图像视觉内容的提取可以是通用的，也可以是基于特定领域的。
Content based image retrieval is to perform the similarity retrieval according to the image features representing the image content, which may be extracted in the generic or specific domain.
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