normalize the resolutions of a list of images in csharp

To normalize the resolutions of a list of images in C#, we can use the System.Drawing namespace to manipulate images. The approach is to resize each image to a common resolution.

Here's a sample code:

main.cs
using System.Drawing;

// This method accepts a list of image file paths and a target resolution
public void NormalizeImageResolutions(List<string> imagePaths, Size targetSize)
{
    foreach (var imagePath in imagePaths)
    {
        using (var input = Image.FromFile(imagePath))
        {
            var output = new Bitmap(targetSize.Width, targetSize.Height);

            using (var g = Graphics.FromImage(output))
            {
                g.DrawImage(input, new Rectangle(0, 0, targetSize.Width, targetSize.Height), new Rectangle(0, 0, input.Width, input.Height), GraphicsUnit.Pixel);
            }

            output.Save(imagePath);
        }
    }
}
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In this code, we loop through each image file path and create a new bitmap with the target size. We then draw the original image onto the new bitmap using the Graphics class. Finally, we save the new bitmap back to the original file path, effectively replacing the original image with the normalized one.

Note that this code does not handle aspect ratios, so if the input images have different aspect ratios, the output images may appear stretched or squished. If you need to handle aspect ratios, you can calculate the appropriate target size based on the original image dimensions.