Abstract: A method, non-transitory computer readable medium and apparatus for generating one or more graphical chromophore maps are disclosed. For example, the method includes receiving a plurality of images from a plurality of different customers, estimating a plurality of different illuminates that were used to capture each one of the plurality of images, calculating a correlation of a spectral reflectance of a lip region of a customer with an absorption curve of hemoglobin for the each one of the plurality of images for each one of the plurality of different illuminates that is estimated, selecting an illuminance of the plurality of different illuminates that provides a highest correlation and generating one or more graphical chromophore maps for subsequently received images of customers using the illuminance that is selected.

Abstract: A method, non-transitory computer readable medium and apparatus for determining spectral characteristics of an image captured by a camera on a mobile endpoint device are disclosed. For example, the method includes receiving the image of a color calibration card comprising a plurality of color patches and a quick response (QR) code, wherein each one of the plurality of color patches has a known spectral reflectance, determining spectral characteristics from the image of the color calibration card, wherein the spectral characteristics are used to analyze additional images that are received from the camera on the mobile endpoint device and transmitting an activation signal to activate an incentive associated with the QR code to the mobile endpoint device in response to receiving the image of the color calibration card.

Abstract: In accordance with one aspect of the present disclosure, apparatus are provided that include a color data conversion subsystem configured to convert color data in order to produce device-dependent output color separation data. The color data conversion subsystem has been configured by gamut mapping including providing a gamut in a hue-based color space and applying color distance adjustments to the hue-based color space. A hue dependent lightness preservation operation can also be part of the subsystem.

Abstract: Methods and devices identify gloss levels and appearance colors for different printers based on the common printing capabilities of the different printers. Such gloss levels and appearance colors are formed from different combinations of one or more colorant marking materials combined or stacked on a print substrate surface. Further, such methods and devices identify common color metameric pairs based on the gloss levels and the appearance colors. Each of the common color metameric pairs has the same appearance color, but has a different gloss level. Patterns of different gloss levels in an area of uniform appearance color form a differential gloss security feature on a printed document. The methods herein can store a file with the common color metameric pairs in a non-transitory storage medium that is operatively connected to at least one of the different printers.

Abstract: An inkjet printer forms ink images from image data including colors in a device independent color space. A color profile associated with the printer maps a plurality of colors in the device independent color space and to a plurality of ink colors formed from a plurality of inks in the printer. The plurality of ink colors only includes colors that are formed with an ink mass density that is below a predetermined threshold.

Abstract: Methods and devices identify gloss levels and appearance colors for different printers based on the common printing capabilities of the different printers. Such gloss levels and appearance colors are formed from different combinations of one or more colorant marking materials combined or stacked on a print substrate surface. Further, such methods and devices identify common color metameric pairs based on the gloss levels and the appearance colors. Each of the common color metameric pairs has the same appearance color, but has a different gloss level. Patterns of different gloss levels in an area of uniform appearance color form a differential gloss security feature on a printed document. The methods herein can store a file with the common color metameric pairs in a non-transitory storage medium that is operatively connected to at least one of the different printers.

Abstract: An inkjet printer forms ink images from image data including colors in a device independent color space. A color profile associated with the printer maps a plurality of colors in the device independent color space and to a plurality of ink colors formed from a plurality of inks in the printer. The plurality of ink colors only includes colors that are formed with an ink mass density that is below a predetermined threshold.

Abstract: In accordance with one aspect of the present disclosure, apparatus are provided that include a color data conversion subsystem configured to convert color data in order to produce device-dependent output color separation data. The color data conversion subsystem has been configured by gamut mapping including providing a gamut in a hue-based color space and applying color distance adjustments to the hue-based color space. A hue dependent lightness preservation operation can also be part of the subsystem.

Abstract: A method and system are provided for producing a print that substantially corresponds to the colorimetric attributes of a corresponding proof for an electronic source file. The method and system entail creating a first raster file corresponding to the electronic source file and a second raster file corresponding to the proof. The first and second raster files are aligned to insure a spatial correlation, and a color conversion data structure is built by comparing the aligned first and second raster files. The color conversion data structure is then used to convert the first raster file to a color converted output file. The color converted output file is color transformed to an output file which is then used to produce the print. The print substantially corresponds to the colorimetric attributes of the corresponding proof for the electronic source file.

Abstract: A color imaging system has a color correction table (10) connected to a printer (12). A set of refinement colors x.sub.i are selected to determine the accuracy of the system. The number of refinement colors selected is small in relation to the number of locations in the color correction table (10), e.g., 1-50%. For each refinement color x, the printer (12) prints a color patch of corresponding color. A measuring device (14) measures each color patch and determines a corresponding colorimetric value x'. A refinement table (16) is generated which maps x' to x using an error difference between x' and x. An interpolator (22) interpolates the known error values across the refinement table based on a weighted sum of the known error values. The weighting is inversely proportional to a Euclidean distance of each interpolated error value from the known error values.