Xerox Corporation

Frederick J Roberts, Jr

Zhigang Fan

Emil Victor Rainero

Robert S Cooperman

Robert Shuchatowitz

Lucy Hadden

Santokh Singh Badesha

Milan Stolka

Ronald J Weagley

Kathleen M McGrane

William M Prest, Jr

Gordon E Johnson

Gilbert B Porter, Iii

Font attributes of characters or letters are estimated by an optical character recognition system using character, run or stroke-based techniques with or without character identification information.

Method of estimating at least one run-based font attribute of a group of characters

Methods for determining font attributes of characters

A neural network based improving the performance of an omni-font classifier by using recognized characters for additional training is presented. The invention applies the outputs of the hidden layer nodes of the neural net as the feature vector. Characters that are recognized with high confidence are used to dynamically train a secondary classifier. After the secondary classifier is trained, it is combined with the original main classifier. The invention can re-adjust the partition or boundary of feature space, based on on-line learning, by utilizing the secondary classifier data to form an alternative partition location. The new partition can be referred to when a character conflict exists during character recognition.

On-line learning for neural net-based character recognition systems

A layered photoresponsive imaging member comprised of a supporting substrate, a photogenerating layer, and a hole transport layer in contact therewith, which layer is comprised of polygermane compounds or copolymers thereof.

Photoresponsive imaging members with polygermanes

An imaging member in accordance with claim 1 wherein the oxygenated polysilylene is of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are independently selected from the group consisting of alkyl, aryl, substituted alkyl, and substituted aryl, and alkoxy; m is from 0 to 0.98 mole percent; n is from 0 to 0.98 mole percent; p is from 0 to 0.98 mole percent; q is from 0.02 to 0.12 mole percent subject to the provisions that the sum of m+n+p is less than or equal to 0.98; and the sum of m+n+p+q is equal to 1.

Photoresponsive imaging members with oxygenated polysilylenes

Photoresponsive imaging members comprised of hole transporting polysilylene compounds with a single peak molecular weight distribution, and wherein the polysilylenes selected have excluded therefrom molecular weight fractions of less than 50,000 thereby enabling, for example, the resulting imaging members to be substantially resistant to liquid ink developer compositions for an extended number of imaging cycles when these members are incorporated into electrostatographic imaging devices.

Photoresponsive imaging members with high molecular weight polysilylene

A photoresponsive imaging member comprised of a supporting substrate, a photogenerating layer, and a hole transporting layer comprised of a polysilylene stabilized with a component possessing an ionization potential equal to or greater than the polysilylene.

Stabilized polysilylenes and imaging members therewith

A method for selectively hardening and toughening the bulk mass of predetermined portions of a polymeric structure which includes the steps of contacting the polymeric structure with a multifunctional monomer to diffuse the monomer into the polymeric structure and irradiating the predetermined portions of the polymeric structure with activating radiation to cause the bulk polymeric material at those portions to be hardened and toughened. In a preferred embodiment the character fonts of a print wheel made from nylon 66 are contacted with a multifunctional monomer which is subsequently exposed to electron beam radiation whereby a structural network of monomer or monomer reactive with polymer or mixtures is formed.

Growing community of inventors

Webster, NY, United States of America

Frederick J Roberts, Jr