Abstract: An authenticable digital code includes a printable medium, a machine-readable digital code, formed on the printable medium, that graphically represent information, and at least one security signature positioned relative to the machine-readable digital code. The security signature includes a fluorescent material that, when excited by light of a first wavelength, fluoresces and emits light at a second wavelength that is different from the first wave length. Authenticity of the authenticable digital code is determined by detecting, when the authenticable digital code is illuminated by light of the first wavelength, light of the second wavelength at a position relative to the machine-readable digital code.

Abstract: An authenticable digital code includes a printable medium, a machine-readable digital code, formed on the printable medium, that graphically represent information, and at least one security signature positioned relative to the machine-readable digital code. The security signature includes a fluorescent material that, when excited by light of a first wavelength, fluoresces and emits light at a second wavelength that is different from the first wave length. Authenticity of the authenticable digital code is determined by detecting, when the authenticable digital code is illuminated by light of the first wavelength, light of the second wavelength at a position relative to the machine-readable digital code.

Abstract: An authenticable digital code includes a printable medium, a machine-readable digital code, formed on the printable medium, that graphically represent information, and at least one security signature positioned relative to the machine-readable digital code. The security signature includes a fluorescent material that, when excited by light of a first wavelength, fluoresces and emits light at a second wavelength that is different from the first wave length. Authenticity of the authenticable digital code is determined by detecting, when the authenticable digital code is illuminated by light of the first wavelength, light of the second wavelength at a position relative to the machine-readable digital code.

Abstract: An authenticable digital code includes a printable medium, a machine-readable digital code, formed on the printable medium, that graphically represent information, and at least one security signature positioned relative to the machine-readable digital code. The security signature includes a fluorescent material that, when excited by light of a first wavelength, fluoresces and emits light at a second wavelength that is different from the first wave length. Authenticity of the authenticable digital code is determined by detecting, when the authenticable digital code is illuminated by light of the first wavelength, light of the second wavelength at a position relative to the machine-readable digital code.

Abstract: A fluorescence detection system includes a light source for coupling with a mobile device and software, having machine readable instructions loadable into memory of the mobile device and executable by a processor of the mobile device, capable of: activating the light source in coordination with capturing one or more images using a camera of the mobile device; analyzing an image captured with the light source on with an image captured with the light source off, to detect a shift of intensity within a predetermined color range within the images; and identifying and authenticating objects by measuring the intensity shift within the images.

Abstract: Systems and methods prevent friendly fire using infrared object recognition. An IR projector projects a beam of IR radiation at a first wavelength onto the object and an IR detector, having a field of view of the object, detects IR fluorescence from the object, where a wavelength of the fluorescence is a function of the first wavelength. The system includes a memory for storing software having machine readable instructions that, when executed by a processor, perform the steps of: (a) controlling the IR projector to generate IR at the first wavelength; (b) controlling the IR detector to capture the object fluorescence; and (c) identifying the object as friendly or non-friendly based upon the object fluorescence. The system further includes an inhibitor for preventing firing of a gun or missile when the object is identified as friendly.

Abstract: Systems and methods authenticate an object using IR. IR is projected at a first wavelength onto the object and a first image of the object is captured during the projection of the IR. The object is authenticated by processing the first image to detect IR fluorescence from an IR fluorescing material incorporated into the object in response to the projected IR, where presence of the IR fluorescence within the first image indicates authentication of the object.

Abstract: A fluorescence detection system includes a light source for coupling with a mobile device and software, having machine readable instructions loadable into memory of the mobile device and executable by a processor of the mobile device, capable of: activating the light source in coordination with capturing one or more images using a camera of the mobile device; analyzing an image captured with the light source on with an image captured with the light source off, to detect a shift of intensity within a predetermined color range within the images; and identifying and authenticating objects by measuring the intensity shift within the images.

Abstract: Systems and methods prevent friendly fire using infrared object recognition. An IR projector projects a beam of IR radiation at a first wavelength onto the object and an IR detector, having a field of view of the object, detects IR fluorescence from the object, where a wavelength of the fluorescence is a function of the first wavelength. The system includes a memory for storing software having machine readable instructions that, when executed by a processor, perform the steps of: (a) controlling the IR projector to generate IR at the first wavelength; (b) controlling the IR detector to capture the object fluorescence; and (c) identifying the object as friendly or non-friendly based upon the object fluorescence. The system further includes an inhibitor for preventing firing of a gun or missile when the object is identified as friendly.

Abstract: One embodiment of the present invention relates to a computer game that is played over a computer network and is capable of accommodating a large number of players. When the game is play on the Internet, players are able to input moves and be apprised of the state of the game using the basic input/output functions of their Web browser. Consequently, the game can be played with substantially no other game related software, plug-ins or add-ons. Another embodiment of the invention relates to the management of a game data base so as to compensate for the lack of game resources that a newer player has relative to older players that are likely to possess significantly greater game resources. Further, the virtual space of the game is highly expandable and updatable. In another embodiment of the invention a game is provided that couples game playing and advertising via a game currency that an advertiser can provide to a player and which can be used by the player in playing the game.

Abstract: One embodiment of the present invention relates to a computer game that is played over a computer network and is capable of accommodating a large number of players. When the game is play on the Internet, players are able to input moves and be apprised of the state of the game using the basic input/output functions of their Web browser. Consequently, the game can be played with substantially no other game related software, plug-ins or add-ons. Another embodiment of the invention relates to the management of a game data base so as to compensate for the lack of game resources that a newer player has relative to older players that are likely to possess significantly greater game resources. Further, the virtual space of the game is highly expandable and updatable. In another embodiment of the invention a game is provided that couples game playing and advertising via a game currency that an advertiser can provide to a player and which can be used by the player in playing the game.