Index: src/wp-includes/class-wp-image-editor-imagick.php
===================================================================
--- src/wp-includes/class-wp-image-editor-imagick.php	(revision 55136)
+++ src/wp-includes/class-wp-image-editor-imagick.php	(working copy)
@@ -380,7 +380,8 @@
 			// Set appropriate quality settings after resizing.
 			if ( 'image/jpeg' === $this->mime_type ) {
 				if ( is_callable( array( $this->image, 'unsharpMaskImage' ) ) ) {
-					$this->image->unsharpMaskImage( 0.25, 0.25, 8, 0.065 );
+					$unsharp_mask_values = apply_filters( 'image_editor_unsharp_mask_filter', array( 0.25, 0.25, 8, 0.065 ) );
+					$this->image->unsharpMaskImage( $unsharp_mask_values[0], $unsharp_mask_values[1], $unsharp_mask_values[2], $unsharp_mask_values[3] );
 				}
 
 				$this->image->setOption( 'jpeg:fancy-upsampling', 'off' );