How to gaussian blur an image in MAUI?

Question

How to gaussian blur an image in MAUI?

Answer 1

Hello,​

You can customize .NET MAUI Image with handlers.

For android,
Before android 12, you can create a Blurred Bitmap like CreateBlurredImage method in following thread, then use SetImageBitmap(bitmap); to set the blurred bitmap
https://github.com/xamarin/docs-archive/tree/master/Recipes/android/other_ux/drawing/blur_an_image_with_renderscript

Android 12 or later, you can set it directly with handler.PlatformView.SetRenderEffect(RenderEffect.CreateBlurEffect(5f,50f, Shader.TileMode.Decal));

For iOS, please create CGImage and set CIGaussianBlur like following code. Then return this BlurredImageView in CreatePlatformView.

   private class BlurredImageView : UIImageView    
          {    
              public override UIImage Image    
              {    
                          var MyContext = CIContext.Create();  
                          var inputImage = CIImage.FromCGImage(value.CGImage);  
                          var filter = new CIGaussianBlur() { Image = inputImage, Radius = 4 };  
                          var resultImage = MyContext .CreateCGImage(filter.OutputImage, inputImage.Extent)            
                          return new UIImage(resultImage);                                               
                  }    
              }    
          }  

For winUI, you can use GaussianBlurEffect Properties to achieve it.

Best Regards,

Leon Lu

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.