c# - 无法在 Adob​​e 软件中打开 .NET 调整大小的图像

Question

我正在按如下方式调整图像大小:

private byte[] ResizeImage(System.Drawing.Image image, double scaleFactor)
{
    //a holder for the result
    int newWidth = (int)(image.Width * scaleFactor);
    int newHeight = (int)(image.Height * scaleFactor);

    Bitmap result = new Bitmap(newWidth, newHeight);

    //use a graphics object to draw the resized image into the bitmap
    using (Graphics graphics = Graphics.FromImage(result))
    {
        //set the resize quality modes to high quality
        graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
        graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
        graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
        //draw the image into the target bitmap
        graphics.DrawImage(image, 0, 0, result.Width, result.Height);
    }

    //return the resulting bitmap
    ImageConverter converter = new ImageConverter();
    return (byte[])converter.ConvertTo(result, typeof(byte[]));
}

虽然这一切看起来运行良好并且大部分情况下都很好，但用户表示当他们尝试在 Adob​​e 软件中打开调整大小的图像时收到错误消息。

插图错误:

The file "MyPhoto.jpg" is in an unknown format and cannot be opened.

Photoshop 错误:

Could not complete your request because an unknown or invalid JPEG marker type is found.

正如我所说，我可以在 Windows 查看器、Picasa、GIMP 等中正常打开图像。似乎是 Adob​​e 软件有问题。

有什么想法吗？谢谢

Answer 1

这可以简单地通过在保存时包含 ImageFormat 来解决。

image.Save("filename.jpg", ImageFormat.Jpeg)