Add gegl:median-blur.

source/gegl/exports.ts

@@ -4,6 +4,7 @@ export * from './cell-noise.js';
 export * from './crop.js';
 export * from './focus-blur.js';
 export * from './generic.js';
+export * from './median-blur.js';
 export * from './mirrors.js';
 export * from './mosaic.js';
 export * from './newsprint.js';

source/gegl/median-blur.ts

@@ -0,0 +1,32 @@
+import {BaseOperation} from './base.js';
+
+export interface MedianBlurParameters {
+  abyssPolicy: 'none' | 'clamp';
+  alphaPercentile: number;
+  highPrecision: boolean;
+  neighborhood: 'square' | 'circle' | 'diamond';
+  percentile: number;
+  radius: number;
+}
+
+export class MedianBlur extends BaseOperation<MedianBlurParameters> {
+  public static default: MedianBlurParameters = {
+    abyssPolicy: 'clamp',
+    alphaPercentile: 50,
+    highPrecision: false,
+    neighborhood: 'circle',
+    percentile: 50,
+    radius: 3,
+  };
+
+  public get default() {
+    return MedianBlur.default;
+  }
+
+  public appendCrop = false;
+  public name = 'gegl:median-blur';
+
+  constructor(parameters?: Partial<MedianBlurParameters>) {
+    super({...MedianBlur.default, ...parameters});
+  }
+}