Systems for spectral multiplexing of source images to provide a composite image, for rendering the composite image, and for spectral demultiplexing the composite image, which achieve increased dynamic range in a recovered source image
First Claim
Patent Images
1. A method of processing a plurality of source images, comprising the steps of:
- encoding the plurality of source images in a composite image according to an image-dependent dynamic range determination so as to provide a maximum usable contrast in at least one recovered source image;
rendering the composite image on a substrate by use of a plurality of colorants; and
recovering the at least one of the encoded source images from the rendered composite image, such that the recovered source image is made distinguishable, by subjecting the rendered composite image to a narrow-band illuminant that is preselected to reveal the source image.
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Abstract
Methods and apparatus for spectrally-encoding plural source images and for providing the spectrally-encoded plural source images in a composite image, for rendering the composite image in a physical form, or for recovering at least one of the encoded source images from the rendered composite image such that the recovered source image is made distinguishable. The composite image is generated using an image-dependent dynamic range determination so as to provide a maximum usable contrast in a recovered source image.
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Citations
20 Claims
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1. A method of processing a plurality of source images, comprising the steps of:
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encoding the plurality of source images in a composite image according to an image-dependent dynamic range determination so as to provide a maximum usable contrast in at least one recovered source image; rendering the composite image on a substrate by use of a plurality of colorants; and recovering the at least one of the encoded source images from the rendered composite image, such that the recovered source image is made distinguishable, by subjecting the rendered composite image to a narrow-band illuminant that is preselected to reveal the source image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An imaging system, comprising:
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a spectral multiplexer for receiving image data representative of plural source images and for processing the image data to encode the source images in a composite image according to an image-dependent dynamic range determination so as to provide a maximum usable contrast in at least one recovered source image, and for providing a composite image data signal; an image rendering device which is responsive to the spectral multiplexer for receiving the composite image data signal and for rendering the composite image on a substrate; and a demultiplexer for subjecting the rendered composite image on the substrate to illumination by a narrow band illuminant having a selected spectral power distribution, such that the at least one of the encoded source images is made detectable.
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- 13. A system for spectral multiplexing of plural source images, comprising a spectral multiplexer for receiving image data representative of a plurality of source images and for processing the image data to encode the plurality of source images into a composite image data signal according to an image-dependent dynamic range determination so as to provide a maximum usable contrast in at least one recovered source image, wherein values representative of each source image pixel are mapped to a corresponding pixel value in a respective colorant image plane.
- 15. A system for rendering a composite image, comprising an image recording device for receiving the composite image generated according to an image-dependent dynamic range determination so as to provide a maximum usable contrast in a recovered source image, the composite image been provided in the form of a composite image data file, and for rendering the corresponding composite image as a rendered composite image in a plurality of narrow band colorants on a substrate.
- 18. A system for spectral demultiplexing of a rendered composite image having encoded therein a plurality of source images generated according to an image-dependent dynamic range determination so as to provide a maximum usable contrast in at least one recovered source image, comprising a demultiplexer for subjecting the rendered composite image to illumination by a narrow band illuminant having a selected spectral power distribution, such that at least one of the encoded source images is made distinguishable.
Specification