Can Images Be Resized Without Quality Loss?

How to resize an image while minimizing quality loss?

Question: Is it possible to resize an image without losing quality at all?

Answer: Unfortunately, it is not possible to completely avoid quality loss when resizing an image. However, you can minimize quality loss through some specific techniques.

Minimizing Quality Loss in C#

As rcar mentioned, completely preserving quality is not possible. However, you can implement the following steps in C# to minimize quality loss:

Bitmap newImage = new Bitmap(newWidth, newHeight);
using (Graphics gr = Graphics.FromImage(newImage))
{
    gr.SmoothingMode = SmoothingMode.HighQuality;
    gr.InterpolationMode = InterpolationMode.HighQualityBicubic;
    gr.PixelOffsetMode = PixelOffsetMode.HighQuality;
    gr.DrawImage(srcImage, new Rectangle(0, 0, newWidth, newHeight));
}

These settings ensure that the interpolation and smoothing algorithms used during the resize process prioritize maintaining image quality, resulting in better results than using the default settings.

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