Use of Image Analysis and Colorimetric Calibration for Automatic Setting of Scanner- and Reproduction-Parameters

Improvements for high quality color reproduction systems by: - optimizing the work flow with job preparation devices for scaling and layouting, mounting of originals, presetting and previewing and scanning with additional automatic correction of scan-focus values for optimal sharpness and for the preview station ChromaLight the use of image analyzing methods with histograms of colorimetric prescan-data for automatic setting of the most important separation parameters. - optimizing the work flow with job preparation devices for scaling and layouting, mounting of originals, presetting and previewing and scanning with additional automatic correction of scan-focus values for optimal sharpness and for the preview station ChromaLight the use of image analyzing methods with histograms of colorimetric prescan-data for automatic setting of the most important separation parameters. - scanning with well aligned and stable R,G,B-filters and use of three-dimensional colorimetric calibrations for transformation the RGB-color pixel data to device independent CIELAB-data or equivalent ones in order to get an exact color recognition at the scanner and then to use these optimal data for communication and color manipulation followed by separate transformations to separation signals dependent on the customers print-conditions. - automatic gradation adaptation for different print conditions, screen rulings, output-formats and original-density ranges in order to enhance the throughput of separation sets at a high quality level even for unskilled operators. - offering different levels for input of job-parameters based on the individual operator-knowledge and in addition a new function for easy color-correction based on the sensational color coordinates Hue, Chroma and Luminance with selectable ranges and adjustable maximum effect on a selected color hue in the original.