TY - GEN A1 - Steckert, Carsten A1 - Witt, Klaus ED - Eschbach, R. T1 - Application of digital color image analysis for colorimetric quality evaluation of surface defects on paint coatings T2 - Color imaging: device-independent color, color hardcopy, and graphic arts VI N2 - A method for the quality management of paint producers was developed that allows for an objective description of inhomogeneous fading of paint coatings after free weathering using relevant metric quantities such as color contrast, gradient of color contrast, and geometric features of the inhomogeneous structures. These may be quantified with the method of digital color image analysis. The first step to apply this technique means a systematic investigation of the color transformation properties specific of the selected input/output devices (CRT display, flatbed scanner) used for digital imaging. To build a color management system mathematical models of the color transformation processes were optimized and embedded in a commercial color image analysis software. The needed metric parameters, that evaluate the damages on the coated surfaces, must be deduced for highest possible agreement with visual judgements of experts on the categorization of the damages. 150 samples of paint coatings after weathering were selected to investigate this correlation. T2 - 6th Conference "Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts" CY - San José, CA, USA DA - 2001-01-23 KW - Free weathered paints KW - Inhomogeneous surface defects KW - Colorimetric quality evaluation KW - Analytical device calibration KW - Color image analysis PY - 2001 UR - http://cat.inist.fr/?aModele=afficheN&cpsidt=17427491 SN - 0-8194-3978-9 SN - 1605-7422 N1 - Serientitel: SPIE proceedings series – Series title: SPIE proceedings series IS - 4300 SP - 337 EP - 347 PB - SPIE CY - Bellingham, Wash. AN - OPUS4-1017 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -