Use this dialog box to clean up a bitonal image by removing stray pixels, often called “speckles.”
In this dialog box, use AutoCAD units to specify the size of the speckles you want to remove.
Specifies the speckle size (in AutoCAD units) you want to remove. When determining the best size to use, note that a size too large may remove parts of text, such as periods or the dots of the letter “i”.
Pick two points to draw a window around a speckle that is the largest size you want to remove.