MULTIPLE SHADE LATENT IMAGES
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United States of America Patent
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Issued Date -
Aug 14, 2014
app pub date -
Feb 10, 2014
filing date -
Feb 8, 2013
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Abstract
Various examples are provided for creating encoded security images that are formed by embedding a multi-shade hidden or latent image into a visible image. The multi-shade latent image may include image content having a wide range of tonal values. An article of manufacture is provided having a surface with image elements thereon, the image elements include characteristics that correspond to a relative color or a relative shade of a source image for a polychromic or multiple shade latent image. The latent image is visible when the surface is viewed at glancing angles.
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