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An Automatic System for Modeling and Controlling Color Quality of Dyed Leathers in Tanneries

机译：一种自动系统，用于制革中染色皮革颜色质量的自动化系统

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This paper presents an automatic system for modeling and controlling color quality of dyed leathers of an Italian tannery. The proposed software is implemented within the IT company system, and is fully integrated with the machineries of the finishing line, that is, a spraying cabin with a robotic carousel, and an electronic tintometer system. Suitable experimental tests according to the Design of Experiments (DoE) are firstly defined, executed and analyzed for a series of color tones of interest. In order to derive and validate a set of colorimetric models able to evaluate and predict the color rendering of painted leathers, a set of recipes of basic dye pigments and data of light reflection measured by a multispectral camera are used. Principal Component Analysis is applied for dimensionality reduction, and linear least squares regression is employed to identify these data-driven models, which are then used for color control purpose. A color correction feedback strategy is indeed developed in order to converge towards the various target formulations. The control algorithm aims at reaching the multispectral reading values of the reference, that is, the first sample of unknown color recipe starting from the most similar archive base and appropriately updating the recipe of pigments, by using the measurement of leather samples prepared from time to time by the finishing line machineries. A set of company data are used to successfully validate the identified colorimetric models and the proposed color correction strategy.
机译：本文介绍了意大利制革厂染色皮革型颜色质量的自动系统。拟议的软件是在IT公司系统中实施的，并与精加工线的机械完全集成，即带有机器人转盘的喷射舱和电子压力计系统。首先定义根据实验（DOE）设计的合适的实验测试，执行和分析其感兴趣的一系列色调。为了获得和验证能够评估和预测涂料皮革的颜色渲染的一组比色模型，使用一组基本染料颜料的配方和由多光谱相机测量的光反射数据。主要成分分析应用于维度降低，并且采用线性最小二乘因子来识别这些数据驱动模型，然后用于颜色控制目的。确实开发了一种颜色校正反馈策略，以便达到各种目标配方。控制算法旨在达到参考的多光谱读取值，即，从最相似的归档底座开始，并通过使用从时间制备的皮革样品的测量来适当地更新颜料配方的第一颜色配方的第一样本。完成线机械的时间。一组公司数据用于成功验证所识别的比色模型和所提出的颜色校正策略。

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