file - bmp 文件比较？

Question

我想比较两个 bmp 文件。我想到了两种方法:

1. 比较两个文件的文件头以及信息头
2. 将bmp文件转换为二进制，然后进行上述比较

但是，我不知道如何开始以及哪种方法更好。如果有人可以帮助我，我会很高兴!

Answer 1

我不知道您想在哪个平台上实现此功能，但这里有一些可能有用的代码片段:

Compare two images with C#

This is a snippet to compare 2 images to see if they are the same. This method first converts each Bitmap to a byte array, then gets the hash of each array. We then loop through each in the hash to see if they match.

/// <summary>
/// method for comparing 2 images to see if they are the same. First
/// we convert both images to a byte array, we then get their hash (their
/// hash should match if the images are the same), we then loop through
/// each item in the hash comparing with the 2nd Bitmap
/// </summary>
/// <param name="bmp1"></param>
/// <param name="bmp2"></param>
/// <returns></returns>
public bool doImagesMatch(ref Bitmap bmp1, ref Bitmap bmp2)
{
  ...
}