Tuning Retinex parameters

Our goal is to understand how the Retinex parameters affect the predictions of the model. A simplified Retinex computation is specified in the recent MATLAB TM implementation; however, there remain several free parameters that introduce significant variability into the model's predictions. We extend previous work on specifying these parameters. In particular, instead of looking for fixed values for the parameters, we establish methods that automatically determine values for them based on the input image. These methods are tested on the McCann-McKee-Taylor asymmetric matching data, along with some previously unpublished data that include simultaneous contrast targets.

[1]  J. McCann,et al.  Influence of intraocular scattered light on lightness-scaling experiments. , 1983, Journal of the Optical Society of America.

[2]  Robert Sobol,et al.  Improving the Retinex algorithm for rendering wide dynamic range photographs , 2002, IS&T/SPIE Electronic Imaging.

[3]  John J. McCann,et al.  Retinex in Matlab , 2000, CIC.

[4]  Alessandro Rizzi,et al.  The Spatial Properties of Contrast , 2003 .

[5]  E. Land,et al.  A TECHNIQUE FOR COMPARING HUMAN VISUAL RESPONSES WITH A MATHEMATICAL MODEL FOR LIGHTNESS* , 1970, American journal of optometry and archives of American Academy of Optometry.

[6]  Robert Sobol,et al.  Improving the Retinex algorithm for rendering wide dynamic range photographs , 2002, IS&T/SPIE Electronic Imaging.

[7]  John J. McCann,et al.  Tuning Retinex parameters , 2002, IS&T/SPIE Electronic Imaging.

[8]  Brian V. Funt,et al.  Control parameters for retinex , 2002, Other Conferences.

[9]  L. G. Glasser,et al.  Cube-Root Color Coordinate System , 1958 .

[10]  John J. McCann,et al.  The Role Of Simple Nonlinear Operations In Modeling Human Lightness And Color Sensations , 1989, Photonics West - Lasers and Applications in Science and Engineering.

[11]  S. McKee,et al.  Quantitative studies in retinex theory a comparison between theoretical predictions and observer responses to the “color mondrian” experiments , 1976, Vision Research.