services.AddImageWizard();

//or

services.AddImageWizard(options => 
                       {
                           options.AllowUnsafeUrl = true;
                           options.AllowedDPR = new double[] { 1.0, 1.5, 2.0, 3.0, 4.0 };
                           options.Key = new byte[64] { .. };
                           options.UseETag = true;                                                
                           options.CacheControl.IsEnabled = true;
                           options.CacheControl.MaxAge = TimeSpan.FromDays(365);
                           options.CacheControl.MustRevalidate = false;
                           options.CacheControl.Public = true;
                           options.CacheControl.NoCache = false;
                           options.CacheControl.NoStore = false;
                           //select automatically the compatible mime type by request header
                           options.UseAcceptHeader = true;
			   options.RefreshLastAccessInterval = TimeSpan.FromMinutes(1);
			   options.FallbackHandler = (state, url, cachedData) =>
			    {
				//use the existing cached data if available?
				if (cachedData != null)
				{
				    return cachedData;
				}

				//load fallback image
				FileInfo fallbackImage = state switch
				{
				    LoaderResultState.NotFound => new FileInfo(@"notfound.jpg"),
				    LoaderResultState.Failed => new FileInfo(@"failed.jpg"),
				   _ => throw new Exception()
				};

				if (fallbackImage.Exists == false)
				{
				    return null;
				}

				//convert FileInfo to CachedData
				return fallbackImage.ToCachedData();
			    };
                       })
            //registers ImageSharp pipeline for specified mime types
           .AddImageSharp(c => c
                .WithMimeTypes(MimeTypes.WebP, MimeTypes.Jpeg, MimeTypes.Png, MimeTypes.Gif)
                .WithOptions(x =>
                            {
                                x.ImageMaxHeight = 4000;
                                x.ImageMaxWidth = 4000;
                            })
                //Adds your custom filters
                .WithFilter<BlurFilter>()
		//Executes custom action before the pipeline is started.
                .WithPreProcessing(x =>
                            {
                                x.Image.Mutate(m => m.AutoOrient());
                            })
		//Executes custom action after the pipeline is finished.
                .WithPostProcessing(x =>
                            {
			    	//blurs all images
                                x.Image.Mutate(m => m.Blur());
                              
                                //overrides target format (Jpeg to WebP)
				if (x.ImageFormat is JpegFormat)
				{
                                    x.ImageFormat = new WebPFormat() { Lossless = false };
				}
				//overrides target format (Png to WebP)
				else if (x.ImageFormat is PngFormat)
				{
                                    x.ImageFormat = new WebPFormat() { Lossless = true };
				}
				
				//overrides metadata
				x.Image.Metadata.ExifProfile = new ExifProfile();
                        	x.Image.Metadata.ExifProfile.SetValue(ExifTag.Copyright, "ImageWizard");
                            }))
           //.AddSkiaSharp()
           .AddSvgNet()
	   .AddDocNET()
           //uses file cache (relative or absolute path)
           .SetFileCache(options => options.Folder = "FileCache") 
           //or MongoDB cache
           .SetMongoDBCache(options => options.Hostname = "localhost")
           //or distributed cache
           .SetDistributedCache()
           //adds some loaders
           .AddFileLoader(options => options.Folder = "FileStorage")
           .AddHttpLoader(options => 
          	{
		   //checks every time for a new version of the original image.
		   options.RefreshMode = LoaderRefreshMode.EveryTime;

		   //sets base url for relative urls
		   options.DefaultBaseUrl = "https://mydomain";

		   //allows only relative urls 
		   //(use base url from request or DefaultBaseUrl from options)
		   options.AllowAbsoluteUrls = false;

		   //allows only specified hosts
		   options.AllowedHosts = new [] { "mydomain" };

		   //adds custom http header like apikey to prevent 
		   //that user can download the original image
		   options.SetHeader("ApiKey", "123456");
     		})
           .AddYoutubeLoader()
           .AddGravatarLoader()
	   .AddOpenGraphLoader()
           .AddAnalytics()
	    //Adds a background service which removes cached data based on defined CleanupReason.
            //The cache needs to implements ICleanupCache.
            .AddCleanupService(x =>
		    {
			//Duration between the cleanup actions. (Default: 1 day)
			x.Interval = TimeSpan.FromMinutes(1);

			//Removes cached data which are older than defined duration. 
			x.OlderThan(TimeSpan.FromMinutes(2));

			//Removes cached data which are last used since defined duration. 
			x.LastUsedSince(TimeSpan.FromMinutes(2));

			//Removes cached data which are expired (based on the loader result).
			x.Expired();
		    })
           ;

//default path: /image
app.UseImageWizard(x =>
		{
			//default path: /analytics
			x.MapAnalytics();
		});

 public class BackgroundColorFilter : ImageSharpFilter
    {
        //use dependency injection
        public BackgroundColorFilter(ILogger<BackgroundColorFilter> logger)
        {
          //...
        }
        
        [Filter]
        public void BackgroundColor(byte r, byte g, byte b)
        {
            Context.Image.Mutate(m => m.BackgroundColor(new Rgba32(r, g, b)));
        }

        [Filter]
        public void BackgroundColor(float r, float g, float b)
        {
            Context.Image.Mutate(m => m.BackgroundColor(new Rgba32(r, g, b)));
        }
    }

services.AddImageWizard()
	.AddImageSharp(c => c.WithFilter<BackgroundColorFilter>());

"/backgroundcolor(255,255,255)/"
"/backgroundcolor(1.0,1.0,1.0)/"

 public class ResizeFilter : ImageSharpFilter
 {
      [Filter]
      public void Resize([DPR]int width, [DPR]int height)
      {
          Context.Image.Mutate(m => m.Resize(width, height));
      }
 }

"/dpr(2.0)/resize(200,100)/"             //calls resize filter with the resolution 400 x 200
or 
"/resize(200,100)/" + client hints  

Content-DPR: 2

 public class TextFilter : ImageSharpFilter
 {
      [Filter]
      public void DrawText(int x = 0, int y = 0, string text = "", int size = 12, string font = "Arial")
      {
          Context.Image.Mutate(m =>
          {
              m.DrawText(
                  text,
                  new Font(SystemFonts.Find(font), size),
                  Rgba32.Black,
                  new PointF(x, y));
          });
      }
 }

"/drawtext(text='Hello',x=10,y=20)/"

services.Configure<ImageWizardClientSettings>(Configuration.GetSection("ImageWizard"));

services.AddImageWizardClient();

//or

services.AddImageWizardClient(options => 
{
    options.BaseUrl = "https://<your-domain>/image";
    options.Key = "..";
    options.Enabled = true;
    options.UseUnsafeUrl = false;
});

@Url
.ImageWizard()
//use HTTP loader
.Fetch("https://<your-domain>/test/picture.jpg")
//fetch local file from wwwroot folder (with fingerprint)
.FetchLocal("picture.jpg")
//or file loader
.File("test/picture.jpg")
//or azure
.Azure("image.jpg")
.AsImage()
.Resize(160,140,ResizeMode.Max)
.Blur()
.Grayscale()
.Jpg(90)
.BuildUrl()

@IImageWizardUrlBuilder UrlBuilder

<img src="@UrlBuilder.FetchLocalFile("picture.jpg").AsImage().Resize(400, 200, ResizeMode.Max).Grayscale().BuildUrl()" />

<img src="@Url.ImageWizard().FetchLocalFile("picture.jpg").AsImage().Resize(400, 200, ResizeMode.Max).Grayscale().BuildUrl()" />

<img src="@Url.ImageWizard().Fetch(Model.Body).Resize(900,900).Grayscale().Blur().BuildUrl()">