Change the default value of clipLimit

src/ImageSharp/Processing/Processors/Normalization/HistogramEqualizationOptions.cs

@@ -32,9 +32,9 @@ namespace SixLabors.ImageSharp.Processing.Processors.Normalization
         public bool ClipHistogram { get; set; } = false;
 
         /// <summary>
-        /// Gets or sets the histogram clip limit. Histogram bins which exceed this limit, will be capped at this value. Defaults to 40.
+        /// Gets or sets the histogram clip limit. Histogram bins which exceed this limit, will be capped at this value. Defaults to 350.
         /// </summary>
-        public int ClipLimit { get; set; } = 40;
+        public int ClipLimit { get; set; } = 350;
 
         /// <summary>
         /// Gets or sets the number of tiles the image is split into (horizontal and vertically) for the adaptive histogram equalization. Defaults to 8.

tests/ImageSharp.Tests/Processing/Normalization/HistogramEqualizationTests.cs

@@ -133,10 +133,12 @@ namespace SixLabors.ImageSharp.Tests.Processing.Normalization
                                   Method = HistogramEqualizationMethod.AdaptiveTileInterpolation,
                                   LuminanceLevels = 256,
                                   ClipHistogram = true,
+                                  ClipLimit = 5,
                                   NumberOfTiles = 10
                               };
                 image.Mutate(x => x.HistogramEqualization(options));
                 image.DebugSave(provider);
+                image.CompareToReferenceOutput(ValidatorComparer, provider);
             }
         }
     }