c# - 如何修复 UnsupportedImageFormatException PixelFormat Format32bppArgb？

Question

Accord.NET PointsMarker.cs似乎支持 PixelFormat Format32bppArgb。为什么这会捕获 UnsupportedImageFormatException？

private void Harris()
{
    try
    {
        img1 = new Bitmap(pictureBox1A.Image);
        img2 = new Bitmap(pictureBox1B.Image);
        var harris = new HarrisCornersDetector(0.04f, 1000f);
        harrisPoints1 = harris.ProcessImage(img1).ToArray();
        harrisPoints2 = harris.ProcessImage(img2).ToArray();
        // Show the marked points in the original images
        var img1mark = new PointsMarker(harrisPoints1).Apply(img1);
        var img2mark = new PointsMarker(harrisPoints2).Apply(img2);
        // Concatenate the two images together in a single image
        var concatenate = new Concatenate(img1mark);
        pictureBox.Image = concatenate.Apply(img2mark);
    }
    catch (UnsupportedImageFormatException)
    {
        const string S = "UnsupportedImageFormatException PixelFormat ";
        Console.WriteLine(S + img1.PixelFormat);
        Console.WriteLine(S + img2.PixelFormat);
    }
}

Console.WriteLine 是

UnsupportedImageFormatException PixelFormat Format32bppArgb UnsupportedImageFormatException PixelFormat Format32bppArgb

Answer 1

虽然 Format32bppArgb 似乎在 Accord.NET PointsMarker.cs源中受支持，但我可以通过添加以下内容来修复它：

// Convert to Format24bppRgb
private static Bitmap Get24bppRgb(Image image)
{
    var bitmap = new Bitmap(image);
    var bitmap24 = new Bitmap(bitmap.Width, bitmap.Height, PixelFormat.Format24bppRgb);
    using (var gr = Graphics.FromImage(bitmap24))
    {
        gr.DrawImage(bitmap, new Rectangle(0, 0, bitmap24.Width, bitmap24.Height));
    }
    return bitmap24;
}

Answer 2

解决此问题的另一种方法是将图像保存为System.Drawing.Image（例如xxx.jpg etc）。然后将图像作为图像读回并将其转换为位图。
它对我有用。