If you don’t want to build an editor from scratch, the realistic route is to integrate an existing SDK. A few options to look at:
- LEADTOOLS – commercial, very comprehensive .NET toolkit with image editing and annotation features.
- Atalasoft dotImage – good fit for WinForms/WPF projects, includes editing, viewing, and scanning modules.
- ImageMagick with a .NET wrapper – free, very powerful for processing, but you’d need to build your own UI.
There isn’t a ready-made “drop in” editor like Photoshop or Luminar that you can embed. The paid SDKs above are the most practical choices if you want something integrated into your app.