Wavelet domain Retinex algorithm for image contrast enhancement

Numan Unaldi

doi:10.1117/12.2229554

19 May 2016 Wavelet domain Retinex algorithm for image contrast enhancement

Numan Unaldi

Proceedings Volume 9869, Mobile Multimedia/Image Processing, Security, and Applications 2016; 986907 (2016) https://doi.org/10.1117/12.2229554
Event: SPIE Commercial + Scientific Sensing and Imaging, 2016, Baltimore, MD, United States

Abstract

Multiscale Retinex with Color Restoration (MSRCR) algorithm has an extensive usage in many different applications and performs well for a very large variety of natural images. However, processing in three spectral channels for at least three distinct scale constants makes the algorithm time consuming. In addition, optimal performance is not always obtained with default parameter settings, especially when images that have a dark subject with a very bright background are being processed. In this paper, to overcome the drawbacks of the Retinex algorithm, a wavelet transform (WT) based Retinex approach is proposed, in which a modified version of the MSRCR algorithm is applied to the approximation coefficients of the transformed image. The detail coefficients are also changed in order to provide sharpness besides contrast enhancement. The proposed algorithm has less computational complexity, and also provides more realistic rendition compared to MSRCR.

Citation Download Citation

Numan Unaldi "Wavelet domain Retinex algorithm for image contrast enhancement", Proc. SPIE 9869, Mobile Multimedia/Image Processing, Security, and Applications 2016, 986907 (19 May 2016); https://doi.org/10.1117/12.2229554

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available