Updated ImproveQuality (markdown)

ImproveQuality.md

@@ -51,9 +51,9 @@ Noise is random variation of brightness or colour in an image, that can make the
 
 ### Dilation and Erosion
 
-Bold characters or Thin characters (especially those with [Serifs](https://en.wikipedia.org/wiki/Serif)) may impact the recognition of details and reduce recognition accuracy.  Many image processing programs allow Propagation either negative or positive values to allow [Dilation and Erosion](http://www.mif.vu.lt/atpazinimas/dip/FIP/fip-Morpholo.html#Heading96) of edges of characters against a common background.
+Bold characters or Thin characters (especially those with [Serifs](https://en.wikipedia.org/wiki/Serif)) may impact the recognition of details and reduce recognition accuracy.  Many image processing programs allow [Dilation and Erosion](http://www.mif.vu.lt/atpazinimas/dip/FIP/fip-Morpholo.html#Heading96) of edges of characters against a common background to either dilate or grow in size (Dilation) or shrink (Erosion).
 
-Heavy ink bleeding from historical documents can be compensated for by using an Erosion technique.
+Heavy ink bleeding from historical documents can be compensated for by using an Erosion technique. Erosion can be used to shrink characters back to their normal glyph structure.
 
 For example, GIMP's Value Propagate filter can create Erosion of extra bold historical fonts by reducing the Lower threshold value.