将图像转换为 base64 时文件压缩类型发生变化

Question

I have and image with a compression type of CCITT T.6 which is converted to base64 and sent to a backend API, where base64 string will be converted back to the original image and validate the file details. My problem is whenI convert the base64 string back to its original image, the compression type for the image has now changed to LZW. Does converting an image to a base64 string change its compression type? If so how can I keep the files original compression type.

string img = "";       
using (Image image = Image.FromFile(filepath))
{
    using (MemoryStream m = new MemoryStream())
    {
        image.Save(m, image.RawFormat);
        byte[] imageBytes = m.ToArray();

        // Convert byte[] to Base64 String
        string base64String = Convert.ToBase64String(imageBytes);
        img = base64String;
    }
}

LoadImage(img);

 public void LoadImage(string base64image)
 {
     byte[] bytes = Convert.FromBase64String(base64image);
     Image image;
     using (MemoryStream ms = new MemoryStream(bytes))
     {
         image = Image.FromStream(ms);
     }
     File.WriteAllBytes(filepath,bytes);
 }

Answer 1

Getting rid of the memory stream and using Convert.ToBase64String(File.ReadAllBytes(filepath)) suggested by Steeeve seems to have solved the problem. Image Compression types are now consistent after regenerating the image from a base64 string.