金属漆闪光效果的评价方法和装置的研究

Sparkle Evaluation Method and Device Study for Metallic Paints

在多种光源的45°/0°照明观测条件下,提出了一种测量金属涂料闪光效果的评价方法和开发了测量装置。根据不同的色彩分布和闪光等级,选取39张金属漆色卡并构建了测试样本库。对采集样本的多光谱图像进行校正,以符合不同光源下观察者的视觉响应。通过设定与图像相关的阈值分离闪光点和背景,以BYKmac的测试数据为标准进行标定,得到了闪光面积、闪光强度和闪光等级算法。在D65和A光源照明条件下,进一步比较实验装置对样本闪光等级的测量结果与视觉评价数据的相关性。实验结果表明:在D65光源下,实验装置和人眼数据相关系数为0.848;在A光源下,实验装置和视觉数据的相关系数为0.851。实验装置的测量效果优于现有的测量设备。

Under the 45°/0°illumination observation conditions of various light sources,an evaluation method and measuring device are developed to measure the flash effect of metallic coatings.Based on different color distributions and sparkle grades,39 metallic paints are selected to create the sample database.Multispectral images of the collected samples are corrected to meet the visual response of the observer under different light sources.The sparkle points and background are separated by setting the threshold related to the images.An algorithm for the sparkle area,intensity,and grade is developed by calibrating the test data of BYKmac.The correlation between the sparkle grade measured by experimental setup and visual evaluation data is further evaluated under light sources D65 and A.Experimental results show that the correlation coefficient between the experimental device and visual data are 0.848 and 0.851 under light sources D65 and A,respectively.Moreover,the measurement effect of the experimental device is better than that of the existing measurement equipment.