A new method for real-time edge enhancement and image equalization using photochromic filters is presented. The reversible self-adaptive capacity of photochromic materials is used for creating an unsharp mask of the original image. This unsharp mask produces a kind of self filtering of the original image. Unlike the usual Fourier (coherent) image processing, the technique we propose can also be used with incoherent illumination. Validation experiments with Bacteriorhodopsin and photochromic glass are presented.
© 2009 Optical Society of America
Original Manuscript: March 31, 2009
Revised Manuscript: May 28, 2009
Manuscript Accepted: May 28, 2009
Published: June 22, 2009
José A. Ferrari, Jorge L. Flores, César D. Perciante, and Erna Frins, "Edge enhancement and image equalization by unsharp masking using self-adaptive photochromic filters," Appl. Opt. 48, 3570-3579 (2009)