Patent ID: 7414755
Filing Date: 2008-08-19
Classification: B41F,H04N

Abstract:
1. A process for color quality assessment in a color reproduction process in which a test element array including several test elements is co-reproduced with an image to be reproduced, whereby for the pixels of the image and the test elements of the test element array, color co-ordinate data in an original color space and for the test elements of the test element array said color values in an assessment color space are present, and in which the co-reproduced test element array is colorimetrically measured with respect to the assessment color space, color differences of the test elements relative to the corresponding set color values are determined from their measured color values and a color quality measure is calculated for the reproduced image from the color differences of the test elements, whereby (i) the originating color space (AFR) is divided into a larger number of color space areas (FRB (ii) a test element array (FT) with a number of color elements (FE (iii) at least for a selected part of the pixels of the image (B) that color space area (FRB (iv) for the selected part of the pixel of the image a weighing portion (G (v) for each color space area (FRB (vi) the color differences (dL* (vii) as color quality measure (Q