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| OF THE PRESENT INVENTION The following will be a detailed description of the drawings illustrating ... |
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| In accordance with the present invention, there is provided a method of processing a high ... |
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| Method of improving a digital image as a function of its dynamic range |
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| WITH OBJECTS A general object of the present invention is to provide an improved method and ... |
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| Apparatus for reducing artifacts in error diffused images |
| What is claimed is: 1. Apparatus for a recursive spatial filter which eliminates visible grain ... |
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Visual calibrator for color halftone imaging
| Details |
Inventors: Fisch, Richard S.; Larshus, David A.; Sands, John A.; VerMurlen, Mark E.;
Assignee: Imation, Inc. (Oakdale, MN)
Primary Examiner: Wong; Peter S.
Assistant Examiner: Frahm; Eric
Attorney, Agent or Firm: Bates; Caroline A., Zerull; Susan M., Musser; Arlene K.
A visual calibrator for a digital color imaging proof system includes a series of patches on a carrier layer, the patches composed of combinations of at least two colors in halftone or continuous print, and associated with at least some of the patches are alphanumeric markings which relate to specific changes in an imaging signal for adjustment of the imaging system to modify the color of a proof towards a desired target color. |
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DETAILED DESCRIPTION A visual calibration table is described in which specific target images (combining at least two and up to four or more color separations) are prepared for comparison with a proofing calibration chart.
The target images are placed against a visual calibration scale which has at least four (and as many others as reasonably desired, such as five, six, eight, ten, twelve, fourteen, sixteen, twenty-four, etc.
) preprinted images having both color content (of said at least two or more colors) and specific directions for evaluation of the electronic data (or reference alphanumerics to a separate or associated look-up table) to alter the exposure (i.
e.
, the operation or radiation emission of the electronic proofer) to produce the specifically desired tone, hue, and/or density desired for the image.
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Image Analysis 
