From Edge to Line

A line is a pair of parallel opposing edges closer than some standard sample distance.

Ideal Line

"Ravine" Line Profile

"Ridge" Line Profile

Mixed (Edge - Line)

Line Algorithm

Masks for Quadratic Fit

Interpretation of Line Parameters

• b₀ determines ridge height (not used)
• b₃ determines line strength and width
• b₄ & b₅ determine orientation and elongation
• b₁ & b₂ are related to centroid (used indirectly)

Example

Maintained by John Loomis, last updated 7 July 1998