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DSP Implementation of the Multiscale Retinex Image Enhancement AlgorithmThe Retinex is a general-purpose image enhancement algorithm that is used to produce good visual representations of scenes. It performs a non-linear spatial/ spectral transform that synthesizes strong local contrast enhancement and color constancy. A real-time, video frame rate implementation of the Retinex is required to meet the needs of various potential users. Retinex processing contains a relatively large number of complex computations, thus to achieve real-time performance using current technologies requires specialized hardware and software. In this paper we discuss the design and development of a digital signal processor (DSP) implementation of the Retinex. The target processor is a Texas Instruments TMS320C6711 floating point DSP. NTSC video is captured using a dedicated frame grabber card, Retinex processed, and displayed on a standard monitor. We discuss the optimizations used to achieve real-time performance of the Retinex and also describe our future plans on using alternative architectures.
Document ID
20070020196
Acquisition Source
Langley Research Center
Document Type
Conference Paper
External Source(s)
Authors
Hines, Glenn D.
(NASA Langley Research Center Hampton, VA, United States)
Rahman, Zia-ur
(College of William and Mary Williamsburg, VA, United States)
Jobson, Daniel J.
(NASA Langley Research Center Hampton, VA, United States)
Woodell, Glenn A.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 23, 2013
Publication Date
July 15, 2004
Publication Information
Publication: Proceedings of SPIE
Volume: 5438
ISBN: 9.78E+12
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: VIsual Information Processing XIII
Location: Orlando, FL
Country: United States
Start Date: April 15, 2004
End Date: April 16, 2004
Sponsors: International Society for Optical Engineering
Funding Number(s)
CONTRACT_GRANT: NNL04AA02A
Distribution Limits
Public
Copyright
Other

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