Sharp boundary.
A "sharp" boundary is used to describe redoximorphic features that grade sharply from one color to another. The color grade is less than 0.1 mm wide.
Commentary: The distances assigned to redoximorphic boundaries are too narrow and not practical:
Sharp: less than 0.1 mm (requires 10X magnification)
Clear: 0.1 to less than 2.0 mm
Diffuse: equal to or more than 2.0 mm
In the photo above are two examples with striking contrast with abrupt boundaries. Zoom in and you will see they are not sharp, but clear or diffuse ranging from about 1 to 2 mm. From an application standpoint, using the above criteria, very few features will have a sharp boundary.
Sharp boundary.
A "sharp" boundary is used to describe redoximorphic features that grade sharply from one color to another. The color grade is less than 0.1 mm wide.
Commentary: The distances assigned to redoximorphic boundaries are too narrow and not practical:
Sharp: less than 0.1 mm (requires 10X magnification)
Clear: 0.1 to less than 2.0 mm
Diffuse: equal to or more than 2.0 mm
In the photo above are two examples with striking contrast with abrupt boundaries. Zoom in and you will see they are not sharp, but clear or diffuse ranging from about 1 to 2 mm. From an application standpoint, using the above criteria, very few features will have a sharp boundary.