In another example, Pearson and Slaughter (1996) applied linescans
from computer vision to detect early split lesions in the hulls
of pistachio nuts. Gray scale intensity profiles were computed
across the width of the nut, and profiles crossing an early split lesion
– illustrated by a deep and narrow valley on the profile – were
computed every 0.5 mm along the longitudinal axis of the nut. The
numbers of adjacent profiles with deep and narrow valleys were
recorded and it was determined that nuts with early split lesions
contained a significantly higher count of these adjacent profiles
than normal nuts. All the early split nuts and 99% of the normal
nuts were correctly classified in this fashion