Program.cs

using System;
using System.IO;
using System.Reflection;
using ComputeSharp.BokehBlur.Processors;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Processing;
using SixLabors.ImageSharp.Processing.Processors;
using ImageSharpRgba32 = SixLabors.ImageSharp.PixelFormats.Rgba32;

Configuration.Default.PreferContiguousImageBuffers = true;

Console.WriteLine(">> Loading image");

string path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)!, "city.jpg");
using Image<ImageSharpRgba32> image = Image.Load<ImageSharpRgba32>(path);

// Apply a series of processors and save the results
foreach ((string Name, IImageProcessor Processor) effect in new (string Name, IImageProcessor Processor)[]
{
    ("bokeh", new HlslBokehBlurProcessor(80, 2)),
    ("gaussian", new HlslGaussianBlurProcessor(80))
})
{
    Console.WriteLine($">> Applying {effect.Name}");

    using Image copy = image.Clone(c => c.ApplyProcessor(effect.Processor));

    Console.WriteLine($">> Saving {effect.Name} to disk");

    string targetPath = Path.GetDirectoryName(path)!;

    while (Path.GetFileName(targetPath) != "ComputeSharp.ImageProcessing")
    {
        targetPath = Path.GetDirectoryName(targetPath)!;
    }

    targetPath = Path.Combine(targetPath, $"{Path.GetFileNameWithoutExtension(path)}_{effect.Name}{Path.GetExtension(path)}");

    copy.Save(targetPath);
}