.netrotateflip减少文件大小

发布于 2024-10-19 06:22:30 字数 434 浏览 4 评论 0原文

我有一小段代码来旋转图像

Sub RotateImage(ByVal FilePath As String)
    Dim img = System.Drawing.Image.FromFile(FilePath)
    img.RotateFlip(System.Drawing.RotateFlipType.Rotate90FlipNone)
    img.Save("c:\test.jpg", ImageFormat.Jpeg)
    img.Dispose()
End Sub

由于某种原因，新图像是 758kb，而不是原始图像的 1.69 mb。

这是为什么？我该如何解决这个问题？

我不想压缩图像，只是旋转它。

除此之外，我比较了win explorer中的属性，它们似乎都是相同的，包括分辨率。那么到底发生了什么？

原文

I have a short snippet of code to rotate an image

Sub RotateImage(ByVal FilePath As String)
    Dim img = System.Drawing.Image.FromFile(FilePath)
    img.RotateFlip(System.Drawing.RotateFlipType.Rotate90FlipNone)
    img.Save("c:\test.jpg", ImageFormat.Jpeg)
    img.Dispose()
End Sub

For some reason, the new image is 758kb instead of 1.69 mb as the original.

Why is this and how can I fix this?

I do not want to compress the image, just rotate it.

other then that, I compared the properties in win explorer, and they all seem to be identical, including resolution. so what is actually happening?

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