Patent Document ID: 4342047
Application ID: 06145096
Patent Status: 1

Claim One:
1. A method of defining, to a color identification circuit used by a color raster scanner to identify the color content of reflected images obtained by the scanner from a source chart, the resident colors of the source chart, comprising the steps of: identifying on the source chart to be scanned, small areas which contain only one resident color and assigning a color number to each area; positioning the sense input of the color raster scanner at two locations within each identified area and defining the source chart coordinate values for each of these two locations so as to provide to the scanner a set of coordinate values definitive of a rectangular portion within each identified area; recording with the raster scanner a plurality of image samples located within the defined coordinates in each area so as to provide a plurality of sample images associated with each resident color number; comparing the sample images recorded for each color number with the sample images recorded for each other color number to determine for each the number of said sample images which do not uniquely identify the resident color associated therewith, and identifying that number of samples as uncalibrated samples; and modifying the data samples obtained for one or more of the resident color number so as to reduce to a minimum the number of said uncalibrated samples in all of the resident colors.