Patent ID: 8085434
Filing Date: 2011-12-27
Classification: H04N

Abstract:
1. A method for predicting the appearance of a color print viewed under UV illumination, said method comprising the steps of: using a multi-colorant digital printer to print a multi-colorant target comprising a plurality of color patches each printed using a known coverage of one or more of a plurality of printer colorants; illuminating the target using a UV light source; capturing an electronic image of the multi-colorant target while illuminated with the UV light source, wherein said electronic image comprises a plurality of color signals acquired for each color patch of said multi-colorant target; using at least one of the plurality of color signals for each color patch to compute a prediction of luminance under UV light for each color patch of said multi-colorant target; from the prediction of luminance under UV light for each color patch, deriving a UV printer characterization model that relates any arbitrary combination of said printer colorants to a predicted UV luminance, said predicted UV luminance for said combination of printer colorants indicating a relative luminance ordering resulting from printing a document using such combination of printer colorants and viewing the document while the document is illuminated with a UV light source; correcting said UV printer characterization model based upon input received from human observers performing a visual matching task, wherein said visual matching task comprises: