如何使用PHP计算出两个图像的相似度

Question

有两个jpg文件的二进制数据，如何使用php计算出它们的相似度。 如果有可能从二进制代码中获取颜色信息。更重要的是，服务器无法支持gd，它是委托服务器。

Answer 1

以前的这些问题似乎是相关的：

• How can I measure the similarity between two images?
• Image fingerprint to compare similarity of many images
• What algorithm could be used to identify if images are the "same" or similar, regardless of size?
• Duplicate image detection algorithms?
• Similar image search software (like TinEye)
• Looking for image similarity library that doesn't care about image dimensions