C# Resized images have black borders

Question

I have a problem with image scaling in .NET. I use the standard Graphics type to resize images like in this example:

public static Image Scale(Image sourceIm         


        

Answer 1

How does the following work for you? This is the code I've used to do the same thing. The main difference I notice is that I don't use SetResolution (and I assume a square input and output, since that was the case for me).

/// 

/// Resizes a square image
/// 
/// Image to resize
/// Width and height of new image
/// A scaled version of the image
internal static Image ResizeImage( Image OriginalImage, int Size )
{
    Image finalImage = new Bitmap( Size, Size );

    Graphics graphic = Graphics.FromImage( finalImage );

    graphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighSpeed;
    graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed;
    graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

    Rectangle rectangle = new Rectangle( 0, 0, Size, Size );

    graphic.DrawImage( OriginalImage, rectangle );

    return finalImage;
}