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A new algorithm for unsupervised global and local color correction
Random Spray Retinex: A New Retinex Implementation to Investigate the Local Properties of the Model
- E. Provenzi, Massimo Fierro, A. Rizzi, L. D. Carli, D. Gadia, D. Marini
- MathematicsIEEE Transactions on Image Processing
A new implementation in which paths are replaced by 2-D pixel sprays, hence the name "random spray Retinex" is proposed, which has faster performances than the path-wise one.
Perceptual Color Correction Through Variational Techniques
- M. Bertalmío, V. Caselles, E. Provenzi, A. Rizzi
- Computer ScienceIEEE Transactions on Image Processing
- 1 April 2007
This paper proposes a novel image functional whose minimization produces a perceptually inspired color enhanced version of the original, and shows that a numerical implementation of the gradient descent technique applied to this energy functional coincides with the equation of automatic color enhancement (ACE), a particular perceptual-based model of color enhancement.
A proposal for Contrast Measure in Digital Images
A Spatially Variant White-Patch and Gray-World Method for Color Image Enhancement Driven by Local Contrast
- E. Provenzi, C. Gatta, Massimo Fierro, A. Rizzi
- Computer ScienceIEEE Transactions on Pattern Analysis and Machine…
- 1 October 2008
It is shown that the combination of a pure WP algorithm (RSR: random spray Retinex) and an essentially GW one (ACE) leads to a more robust and better performing model (RACE), which has a general applicability to perceptually inspired color correction algorithms.
From Retinex to Automatic Color Equalization: issues in developing a new algorithm for unsupervised color equalization
We present a comparison between two color equalization algorithms: Retinex, the famous model due to Land and McCann, and Automatic Color Equalization (ACE), a new algorithm recently presented by the…
Underwater color constancy: enhancement of automatic live fish recognition
- M. Chambah, D. Semani, A. Renouf, P. Courtellemont, A. Rizzi
- Computer ScienceIS&T/SPIE Electronic Imaging
- 18 December 2003
The proposed color correction method is based on ACE model, an unsupervised color equalization algorithm, a perceptual approach inspired by some adaptation mechanisms of the human visual system, in particular lightness constancy and color constancy.
A computational approach to color adaptation effects
ACE: An Automatic Color Equalization Algorithm
A new algorithm for digital images unsupervised enhancement, called ACE for Automatic Color Equalization, based on a new computational approach that merges the "Gray World" and "White Patch" equalization mechanisms, while taking into account the spatial distribution of color information.
Mathematical definition and analysis of the retinex algorithm.
- E. Provenzi, L. De Carli, A. Rizzi, D. Marini
- Computer ScienceJournal of the Optical Society of America. A…
- 1 December 2005
An analytic formula is proposed that describes the algorithm behavior of Retinex varying the number of paths and its recursive iterations are mathematically analyzed using the formula.