Eastman-kodak Company

Judith A Bose

Thomas D Pawlik

Myra T Olm

Thomas J Widzinski

Ronald R Valente

Ronald S Cok

Stephen P Singer

Nelson Adrian Blish

Louis Elbert Friedrich

David Hoke

Robert F Romanet

Joan C Potenza

Erwin Ludwig Allmann

Gary M Spinelli

Mark P Henry

Dino Aimino

Deborah D DeMejo

A system of authenticating an item with a security mark includes a substrate (); wherein the security mark is printed on the substrate with invisible ultraviolet (UV) absorbing ink (); a coating comprised of UV fluorescent varnish () applied over the security mark and substrate; wherein an area comprising the security mark and coating with is illuminated with UV light; wherein a reduced fluorescence image of the security mark is identified; wherein the reduced fluorescence image is compared with the security mark; and wherein the item is authenticated if the reduced fluorescence image matches the security mark.

System for authenticating an item

A method of authenticating an item with a security mark includes providing a substrate (); printing the security mark on the substrate with invisible ultraviolet (UV) absorbing ink (); applying a coating comprised of UV fluorescent varnish () over the security mark and substrate; illuminating an area comprising the security mark and coating with UV light; identifying a reduced fluorescence image of the security mark; comparing the reduced fluorescence image with the security mark; and authenticating the item if the reduced fluorescence image matches the security mark.

Method of authenticating an item

A method for authenticating an object that includes providing a label () with invisible indicia () printed with optically active material on a reflective substrate; providing a device that has a digital camera () having a light source (), an image sensor (), a first polarizing filter () having a first orientation, and a second polarizing filter () having a second orientation; illuminating the label with the light from the light source through the first polarizing filter; forming an image with the image sensor using reflected light from the label wherein the reflected light passes through the second polarizing filter prior to reaching the sensor; wherein the second polarizing filter makes the invisible indicia visible; and authenticating the object.

Method for authenticating an object

A system for authenticating an object includes a label () with invisible indicia () on the object which rotates a polarization of incident light; a digital camera () having a light source (), an image sensor (), a first polarizing filter () having a first orientation, and a second polarizing filter () having a second orientation orthogonal to the first orientation; illuminating the label with light from the light source through the first linear polarizer; forming an image with the image sensor using reflected light from the label wherein the reflected light passes through the second polarizer prior to reaching the sensor; wherein the second linear polarizer makes the invisible indicia visible; and authenticating the object.

System for authenticating an object

A method of enabling an authenticating device () includes providing an enabling target (); measuring one or more attributes of the enabling target with the authenticating device; comparing at least one measured attribute with a predetermined expected value; enabling the authenticating device when the at least one measured attribute matches the predetermined expected value; and operating the authenticating device.

Authentication device with access control and calibration

A method for authenticating security markers includes capturing an image of a region of interest on a product with a camera; storing image data in a two-dimensional array on a microprocessor; counting a number of pixels at or above a predetermined brightness level in the image data with the microprocessor to determine a first score; establishing an area within the image; counting a number of pixels within the area to determine a second score; calculating a ratio of the second score to the first score; and if the ratio is above a predetermined threshold the security marker is authenticated.

Method of authenticating security marker

A method to deactivate a security measure includes applying a first covert optically active security marker to a product or document; completing a transaction for the product or document; and applying a second optically active security marker to the product or document which indicates completion of the transaction.

Deactivation of a security feature

A method for detecting and viewing invisible indicia includes illuminating the invisible indicia with radiation of a first wavelength with an illumination source; detecting emitted light from the invisible indicia at a second wavelength with a sensor array; eliminating reflected radiation at the first wavelength; focusing an image of the invisible indicia on the sensor array; displaying the image of the invisible indicia; spacing the sensor array at a fixed distance from the invisible indicia with a spacer; and adjusting sensitivity of the sensor array.

Method for viewing invisible indicia

A system for enabling an authenticating device includes an enabling target (); measuring one or more attributes of the enabling target with the authenticating device; comparing at least one measured attribute with a predetermined expected value; enabling the authenticating device when the at least one measured attribute matches the predetermined expected value; and operating the authenticating device.

A method for detecting authorized security markers includes capturing an image of a region of interest on a product with a camera; storing image data in a two-dimensional array on a microprocessor; counting a number of pixels at or above a predetermined brightness level in the image data with the microprocessor to determine a first score; eroding the image data; counting the pixels which remain at or above the predetermined brightness level after erosion to determine a second score; calculating a ratio of the second score to the first score; and producing a first authentication signal if the ratio meets a first predetermined criteria.

Image algorithms to reject undesired image features

Photographic pyrazolotriazole dye forming coupler compounds of coupler intermediate compounds can be readily prepared in a single reaction medium by reacting certain pyrazolotriazole compounds with nitro-substituted aromatic compounds in the presence of a formate salt and a transition metal catalyst. This salt hydrogenates the nitro group and the carbonate by-product induces reaction of the resulting amine with the pyrazolotriazole compound. Yields and purity are high, and reaction time is reduced with the specific set of conditions and reactants, and environmental impact from waste is reduced. In addition, isolation of aromatic amine intermediates is avoided. The resulting pyrazolotriazole compounds can be used themselves as photographic dye forming couplers or further reacted to prepare useful coupler compounds for photographic use.

One-pot synthesis of pyrazolotriazole photographic dye forming color

Photographic pyrazolotriazole dye forming coupler compound or coupler intermediate compounds can be readily prepared by inducing an elimination-addition reaction between certain pyrazolotriazole compounds and aromatic amines in the presence of an inorganic base or formate. Yields and purity are high, and reaction time is reduced with the specific set of conditions and reactants, and environmental impact from waste is reduced. The resulting compounds can be used themselves as photographic dye forming couplers or further reacted to prepare useful coupler compounds for photographic use.

Synthesis of pyrazolotriazole photographic dye forming color couplers

The invention provides a photographic element comprising a light sensitive silver halide emulsion layer having associated therewith a dye-forming coupler having formula I: ##STR1## wherein R.sub.1 is selected from the group consisting of alkyl, aryl, and heterocyclic groups;

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Webster, NY, United States of America

Judith A Bose