Systems, methods and apparatus are provided for light-based authentication of a payment card. The payment card may include a randomized mix of materials. The materials may include transparent or translucent materials. A light source may shine light on a surface of the payment card. Light passing through the card may generate a light pattern that is unique to the payment card. The light pattern may be captured and compared to a reference light pattern to authenticate the payment card. In some embodiments, photodetectors may detect light patterns generated through interactions with the card materials.

A matrix bar code on a surface may comprise a plurality of colors and an ultraviolet layer. The matrix barcode may be a fiducial marker for conveying spatial information. The The conveyed spatial information may stem at least in part from the ultraviolet layer.

A matrix bar code on a surface may comprise a plurality of colors and an ultraviolet layer. The matrix barcode may be a fiducial marker for conveying spatial information. The The conveyed spatial information may stem at least in part from the ultraviolet layer.

A matrix barcode on a surface may comprise a plurality of colors and an infrared layer. The matrix barcode may be a fiducial marker for conveying spatial information. The conveyed spatial information may stem at least in part from the infrared layer.

A matrix barcode on a surface may comprise a plurality of colors and an infrared layer. The matrix barcode may be a fiducial marker for conveying spatial information. The conveyed spatial information may stem at least in part from the infrared layer.

This disclosure relates to a card having (i) an infrared-blocking material capable of blocking a plurality of near infrared wavelengths and (ii) at least one phosphor particle capable of absorbing at least one near-infrared wavelength, and a card reader capable of allowing a user to interrogate the card and determine if it is authentic, and to read information from the card. The card reader typically includes a processor configured to cause the card reader to emit at least one wavelength of light, receive at least one additional wavelength of light emitting by the at least one phosphor particle, and identify at least one characteristic of the at least one phosphor particle selected from the group consisting of a location on the card, a rise time of the phosphor, and a decay time of the phosphor.

This disclosure relates to a card having (i) an infrared-blocking material capable of blocking a plurality of near infrared wavelengths and (ii) at least one phosphor particle capable of absorbing at least one near-infrared wavelength, and a card reader capable of allowing a user to interrogate the card and determine if it is authentic, and to read information from the card. The card reader typically includes a processor configured to cause the card reader to emit at least one wavelength of light, receive at least one additional wavelength of light emitting by the at least one phosphor particle, and identify at least one characteristic of the at least one phosphor particle selected from the group consisting of a location on the card, a rise time of the phosphor, and a decay time of the phosphor.

Techniques to improve detection and security of images, including formation and detection of matrix-based images. Some techniques include logic to process image data, generate one or more colorspaces associated with that data, and perform colorspace conversions based on the generated colorspace. The logic may be further configured to generate an image based on the colorspace conversions, including but not limited to a matrix bar code. The logic may be further configured to apply one or both of an ultraviolet layer and an infrared layer to the image, e.g. matrix barcode, generated from the colorspace conversion(s). Other embodiments are described and claimed.

Techniques to improve detection and security of images, including formation and detection of matrix-based images. Some techniques include logic to process image data, generate one or more colorspaces associated with that data, and perform colorspace conversions based on the generated colorspace. The logic may be further configured to generate an image based on the colorspace conversions, including but not limited to a matrix bar code. The logic may be further configured to apply one or both of an ultraviolet layer and an infrared layer to the image, e.g. matrix barcode, generated from the colorspace conversion(s). Other embodiments are described and claimed.

There is provided in one embodiment an apparatus having an image sensor array. In one embodiment, the image sensor array can include monochrome pixels and color sensitive pixels. The monochrome pixels can be pixels without wavelength selective color filter elements. The color sensitive pixels can include wavelength selective color filter elements.