如何使用字节数组比较两个图像 [英] How to compare two images using byte arrays

问题描述

我希望能够从 Byte[] 转换为 Image，反之亦然.

I want to be able to convert from Byte[] to Image and vice versa.

我有这两种方法来自 此处:

I've this two methods from here:

public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
    MemoryStream ms = new MemoryStream();
    imageIn.Save(ms,System.Drawing.Imaging.ImageFormat.Gif);
    return  ms.ToArray();
}

public Image byteArrayToImage(byte[] byteArrayIn)
{
     MemoryStream ms = new MemoryStream(byteArrayIn);
     Image returnImage = Image.FromStream(ms);
     return returnImage;
}

它们似乎有效，但如果我这样做了:

They seem to work, but if I do:

byte[] pic = GetImageFromDb();
bool result = pic == imageToByteArray(byteArrayToImage(pic));

我得到result = false！

有什么方法可以纠正这种方法或一些不同的功能来实现我的目标?

Any way to correct this methods or some different functions to achieve my goal?

谢谢！

推荐答案

如果没有被覆盖，使用 == 将比较对象引用.

Using == will compare the object references if not overridden.

因为这是两个不同的 byte[] 对象，所以引用是不同的.

Since these are two different byte[] objects, the references are different.

您需要逐项比较 byte[] 对象以确认它们是否相同.在这种情况下，您可以使用 SequenceEquals.

You need to compare the byte[] objects item by item in order to confirm that they are identical. You can use SequenceEquals in this case.

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