Abstract: Methods are described that provide dynamic anaglyph images with a first appearance state and a second appearance state. At least one mutable colorant and at least one non-mutable colorant are selected for a colorant type map so that the printed dynamic anaglyph image has a first appearance state in which the at least one mutable colorant is in the first colorant state and is color matched to at least one of a left eye information and a right eye information and so that in the second appearance state printed the mutable colorant is in a second colorant state in which the at least one mutable colorant provides a color that spectrally overlaps a spectral filter in one eye of a pair of stereo color glasses so that three dimensional effects can be perceived.

Abstract: An imaging lens having reduced susceptibility to thermally-induced stress birefringence for imaging an object plane to an image plane; comprising: an aperture stop positioned between the object plane and the image plane; a first group of lens elements located on the object plane side of the aperture stop; and a second group of lens elements located on the image plane side of the aperture stop; wherein the lens elements immediately adjacent to the aperture stop are fabricated using glasses having a negligible susceptibility to thermal stress birefringence as characterized by a thermal stress birefringence metric; and wherein the other lens elements in the first or second groups of lens elements are fabricated using glasses having at most a moderate susceptibility to thermal stress birefringence as characterized by the thermal stress birefringence metric.

Abstract: An imaging lens having reduced susceptibility to thermally-induced stress birefringence for imaging an object plane to an image plane; comprising a plurality of lens elements. The lens element that experiences a highest optical power density is fabricated using a glass having a negligible susceptibility to thermal stress birefringence as characterized by the thermal stress birefringence metric.

Abstract: A color display system providing reduced observer metameric failure for a set of target observers, comprising an image forming system having narrow-band primaries. A data processing system is used to implement a method for color correcting an input color image having input color values adapted for display on a reference display device having a plurality of input color primaries. A metamerism correction transform is applied to the input color image to determine an output color image having output color values in an output color space appropriate for display on the image forming system. The metamerism correction transform modifies colorimetry associated with the input colors to provide output color values such that an average observer metameric failure is reduced for a distribution of target observers.

Abstract: A method for color correcting an input color image having input color values adapted for display on a reference display device having a plurality of input color primaries to account to provide reduced observer metemaric failure on a narrow-band display device. A metamerism correction transform is applied to the input color image to determine an output color image having output color values in an output color space appropriate for display on the narrow-band display device. The metamerism correction transform modifies colorimetry associated with the input colors to provide output color values such that an average observer metameric failure is reduced for a distribution of target observers.

Abstract: A method for color correcting an input color image having input color values adapted for display on a reference display device having a plurality of input color primaries to account to provide reduced observer metemaric failure on a narrow-band display device. A metamerism correction transform is applied to the input color image to determine an output color image having output color values in an output color space appropriate for display on the narrow-band display device. The metamerism correction transform modifies colorimetry associated with the input colors to provide output color values such that an average observer metameric failure is reduced for a distribution of target observers, and is formed responsive to a distribution of perceived color differences for a set of input colors that are determined for a set of target observers.

Abstract: A system for implementing a method for displaying a modified digital image having an improved interest level to a particular person based on an interest level function that determines an interest level of a particular digital image to the particular person responsive to familiarity levels of image elements in the particular digital image. An initial digital image includes one or more image elements having associated initial familiarity levels, the initial digital image having an initial interest level as characterized by the interest level function responsive to the initial familiarity levels. The set of image elements are modified, thereby providing a modified digital image having an increased interest level to the particular person as characterized by the interest level function responsive to modified familiarity levels associated with the modified image elements. The modified digital image is then displayed to the particular person.

Abstract: A method for presenting digital images having a high interest level to a particular person selected from a set of candidate digital images. The candidate digital image are analyzed to designate one or more image elements, and familiarity levels are determined of the designated image elements to the particular person. For each candidate digital image, an associated interest level to the particular person is determined responsive to the determined familiarity levels. One or more of the candidate digital images are selected based on the determined interest levels and are presented to the particular person.

Abstract: A system comprising an image display; a digital camera positioned to capture images of persons viewing the image display; and a memory system storing instructions configured to cause a data processing system to implement a method for presenting digital images having a high interest level to a particular person selected from a set of candidate digital images. The method includes using the digital camera to capture an image including a particular person positioned to view the image display. The candidate digital images are analyzed to designate one or more image elements, and familiarity levels of the designated image elements to the particular person are determined. For each candidate digital image, an associated interest level to the particular person is determined responsive to the determined familiarity levels. One or more of the candidate digital images are selected based on the determined interest levels and are presented to the particular person.

Abstract: A method for increasing the interest level of a digital image to a particular person based on an interest level function that determines an interest level of a particular digital image to the particular person responsive to familiarity levels of image elements in the particular digital image. The initial digital image includes one or more image elements having associated initial familiarity levels, the initial digital image having an initial interest level as characterized by the interest level function responsive to the initial familiarity levels. The set of image elements are modified, thereby providing a modified digital image having an increased interest level to the particular person as characterized by the interest level function responsive to modified familiarity levels associated with the modified image elements. The modified digital image is then displayed to the particular person.

Abstract: A printed dynamic optical illusion printed on a printing device using a plurality of colorants, wherein one or more of the colorants are appearance mutable colorants having spectral characteristics that can be controllably switched between a first colorant state and a second colorant state by application of an appropriate external stimulus, and wherein one or more mutable portions of the optical illusion image are printed using at least one appearance mutable colorant. The mutable portions are controllable such that when they are in a first appearance state the printed optical illusion image has a first illusion state, and when they are in a second appearance state the printed optical illusion image has a second illusion state, thereby changing the optical illusion image from the first illusion state to the second illusion state so as to affect the perception of an optical illusion by a human observer.

Abstract: A method for providing a printed optical illusion image having first and second illusion states, comprising: receiving a specification of an optical illusion image having one or more mutable portions; and printing the optical illusion image on a printing device using a plurality of colorants, wherein one or more of the colorants are appearance mutable colorants having spectral characteristics can be switched between a first colorant state and a second colorant state by application of an appropriate external stimulus. The printed optical illusion image can be switched between the first and second illusion states by applying the appropriate external stimulus to controllably switch the one or more appearance mutable colorants between their first and second colorant states, thereby switching the mutable portions of the printed optical illusion image between corresponding first and second appearance states.

Abstract: A print media (200) comprises paper or other substrate, on which image content, whether text or images are printed with accompanying hidden data (220). The image content is printed with one or more normal printing process visible colorants (340), while the hidden data (220) is printed with spectral edge markers (320). The spectral edge marker materials (320) have a substantial spectral absorption just outside the human visible spectrum, and only slight visible absorption, which is masked by the visible colorants (340). Although the hidden data is nominally visually imperceptible, an image capture device (250) having a visible spectral response that extends into a spectral region just outside the visible spectrum where the spectral edge marker absorption occurs, can then detect the hidden data.

Abstract: A system for detecting visibly hidden content on a print media (200) in which image content is printed with one or more normal printing process visible colorants (340), and which further includes embedded hidden data (220) printed with spectral edge markers (320). These spectral edge marker materials (320) have a substantial spectral absorption just outside the human visible spectrum, either at the UV edge or IR edge, but only slight visible absorption which is masked by the visible colorants (340). Although the hidden data is nominally visually imperceptible, an image capture device (250) having a visible spectral response from at least one spectrally distinct color imaging channel that extends into a spectral region just outside the visible spectrum where the spectral edge marker absorption occurs, can then detect the hidden data.

Abstract: A method for providing digital watermarking for text or images that uses spectral edge marking materials (320) printed on a print media (200) to embed hidden data (220). The spectral edge markers (320) have an absorption spectrum at the edge of the human visible spectrum, either at the UV edge or IR edge, which provides an optical density that is generally imperceptible to humans, but which can be detected by an image capture device (250). The crosstalk of visible optical absorption provided by these materials is largely masked by the presence of visible colorant(s) (340), with only small color differences between areas with and without the spectral edge markers (320). The image capture device (250) has a visible spectral response that extends into a spectral region just outside the visible spectrum where the spectral edge marker absorption occurs, and can be operated to detect the hidden data.

Abstract: Methods are described that provide dynamic anaglyph images with a first appearance state and a second appearance state. At least one mutable colorant and at least one non-mutable colorant are selected for a colorant type map so that the printed dynamic anaglyph image has a first appearance state in which the at least one mutable colorant is in the first colorant state and is color matched to at least one of a left eye information and a right eye information and so that in the second appearance state printed the mutable colorant is in a second colorant state in which the at least one mutable colorant provides a color that spectrally overlaps a spectral filter in one eye of a pair of stereo color glasses so that three dimensional effects can be perceived.

Abstract: Printed dynamic anaglyph images are provided. In one aspect the printed dynamic anaglyph image includes a receiver having with an image formed using a mutable colorant that changes spectral absorbance when exposed to a stimulus and a non-mutable colorant. The mutable colorant and non-mutable colorant are arranged so that the printed image has a first appearance state where portions of the print having the mutable colorant is color matched to the non-mutable colorant and a second appearance state when exposed to an external stimulus. In the second appearance state the mutable colorant provides a color that spectrally overlaps a spectral filter of one eye of a pair of stereo color glasses so that three dimensional effects can be perceived.

Abstract: A printed dynamic anaglyph design apparatus is provided having a source of left eye information and right eye information, a memory data regarding colorant characteristics and a processor. The processor determines a colorant type map. At least one mutable colorant and at least one non-mutable colorant are selected for a colorant type map so that the printed dynamic anaglyph image has a first appearance state in which the at least one mutable colorant is in the first colorant state and is color matched to at least one of a left eye information and a right eye information and so that when the image is exposed to an external stimulus the mutable colorant changes color to provide a second appearance state having a color in a difference region that spectrally overlaps a spectral filter in one eye of a pair of stereo color glasses.

Abstract: An anti-reflective thin film coating formed on an optical surface, comprising a multilayer thin-film stack arranged to suppress reflection of incident polarized light within an incident light wavelength range. The multilayer thin-film stack further provides a reflectance edge transition at a wavelength band that lies outside the incident light wavelength range. The reflectance edge transition is arranged to provide phase difference compensation to the polarized light within the incident polarized light wavelength range.

Abstract: A method for designing an imaging lens having reduced susceptibility to thermally-induced stress birefringence, the imaging lens having first and second groups of lens elements located either side of an aperture stop, the method comprising: defining a set of lens design attributes; defining a set of lens performance criteria including a thermally-induced stress birefringence performance criterion; defining a first set of candidate glasses having a negligible susceptibility to thermal stress birefringence and a second set of candidate glasses having at most a moderate susceptibility to thermal stress birefringence; selecting glasses for lens elements that are located adjacent to the aperture stop from the first set of candidate glasses; selecting glasses for the remaining lens elements from the first or second sets of candidate glasses; and using a computer processor to determine a lens design for the imaging lens.