Time effects on near-infrared imaging for detecting bruises on a

摘要

Abstract: in the near-infrared region has been used frequently to detect bruises on `Delicious' apples. Pixel intensities from bruised and nonbruised regions within an image of an apple are compared to characterize the time effects. Near-infrared reflectance from a bruised site is generally lower than the reflectance from a nearby nonbruised region. This difference usually reaches a maximum 24 hours after inducing the bruise. As the bruise ages in storage, reflectance from the bruised region increases. The reflectance continues to increase and eventually exceeds the reflectance from a nonbruised region. !16