Application of digital color image analysis for colorimetric quality evaluation of surface defects on paint coatings

Carsten Steckert; Klaus Witt

doi:10.1117/12.410808

21 December 2000 Application of digital color image analysis for colorimetric quality evaluation of surface defects on paint coatings

Carsten Steckert, Klaus Witt

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Proceedings Volume 4300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts VI; (2000) https://doi.org/10.1117/12.410808
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

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 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.

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Carsten Steckert and Klaus Witt "Application of digital color image analysis for colorimetric quality evaluation of surface defects on paint coatings", Proc. SPIE 4300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts VI, (21 December 2000); https://doi.org/10.1117/12.410808

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KEYWORDS

Image analysis

Visualization

Calibration

Color difference

CRTs

Reflectivity

Scanners

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