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Published November 1994 | Published
Book Section - Chapter Open

Diffusion networks for on-chip image contrast normalization


A new method for normalizing and quantizing images is presented. The method is based on calculating a local reference frame for the image gray levels. The levels of the reference frame are calculated using biased diffusions that are linked to the original image. The method is conceived to be integrated with sensing elements on the image plane of a camera. Its mathematical properties are analyzed and its performance is experimentally demonstrated. A circuital implementation has been designed, constructed and tested; it consists of a 20 nodes 1-D non-linear resistive grid. Experimental results are shown.

Additional Information

© 1994 IEEE. Date of Current Version: 06 August 2002. This work was supported by NSF Grant IRI 9306155 on "Geometry driven diffusions", by an NSF National Young Investigator Award and by scholarship 204.40.07 from the Consiglio Nazionale delle Ricerche of Italy. We are very grateful to Gabriella Tarantello, Jitendra Malik, Jean-Michel Morel, David Mumford, Michele Pavon and Sergio Solimini for discussions Concerning the proofs of the theorems.

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August 20, 2023
August 20, 2023