DSP implementation of the retinex image enhancement algorithm

Glenn D. Hines; Zia-ur Rahman; Daniel J. Jobson; Glenn A. Woodell

doi:10.1117/12.544500

15 July 2004 DSP implementation of the retinex image enhancement algorithm

Glenn D. Hines, Zia-ur Rahman, Daniel J. Jobson, Glenn A. Woodell

Author Affiliations +

Proceedings Volume 5438, Visual Information Processing XIII; (2004) https://doi.org/10.1117/12.544500
Event: Defense and Security, 2004, Orlando, Florida, United States

Abstract

The 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.

Citation Download Citation

Glenn D. Hines, Zia-ur Rahman, Daniel J. Jobson, and Glenn A. Woodell "DSP implementation of the retinex image enhancement algorithm", Proc. SPIE 5438, Visual Information Processing XIII, (15 July 2004); https://doi.org/10.1117/12.544500

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