title: Real-time adaptive contrast enhancement.
abstract: A recursive filter approach is introduced to simplify real-time implementation of an adaptive contrast enhancement scheme for imaging sensors. With this scheme, even scenes possessing large global dynamic ranges (>40 dB) can be accommodated by the limited dynamic range (20 dB) of a display without losing the local contrast essential for image interpretation. This paper describes the recursive filter implementation of the local area contrast enhancement scheme using charge-coupled devices and the resultant real-time hardware capable of processing standard 525 and 875 line TV compatible video (from vidicons, videotape recorders, etc). Several examples from video imagery are included to demonstrate its effectiveness.
authors.affiliation: MEMBER, IEEE, Systems and Research Center, Honeywell, Inc., Minneapolis, MN 55413.
authors.forename: P M
authors.initials: PM
authors.lastname: Narendra
authors.forename: R C
authors.initials: RC
authors.lastname: Fitch