In January this year, in the "Optical Journal", published a by the China Jiliang University of Optics and Electronic Science and Technology College and Hangzhou color spectrum Technology Co., LTD., jointly studied "metal paint flash effect evaluation method and device research" paper.
This paper describes the researchers developed a measurement device that can evaluate the flash effect of metal paint under various light conditions, and designed visual experiments to verify the degree of match between the measurement results and the human eye evaluation.
In the first step, the experimental setup is set up. When the Angle between the mirror reflected light and the observer is 45°/0°, the flash of the sample is most easily perceived by the observer, and this illumination observation Angle is selected for the experimental setup.
The experimental setup was designed in the following structure, with the illumination source and receiver angles fixed at 45° to ensure consistent measurement conditions.
The second step is to determine the experimental samples and experimental data. Thirty-nine metal paint color cards were selected from the metal paint color cards made by the automobile paint factory as experimental samples. The color and flash data of all the samples under the D65 light source and 45°/0° illumination observation conditions were measured by BYKmac, as well as the sample image data measured by the experimental device. Through calculation, the correlation coefficient between them is 0.880, which is equal to and slightly better than the existing research results.
In the third step, the visual experiment device is established and the visual experiment data is obtained. Ten observers with normal color vision were selected to obtain data for evaluating the flash condition of the metallic paint samples under D65 and A light sources, respectively.
In the fourth step, the experimental data are calculated to obtain the experimental results. The correlation coefficient between the flash level measured by BYKmac and the visual data under D65 light source is 0.878, and the correlation coefficient between the flash data calculated by the experimental device and the visual data under D65 light source is 0.848. The correlation coefficient between the flash level measured by BYKmac and the visual data under light source A is 0.740, and the correlation coefficient between the flash data calculated by the experimental device and the visual data under light source A is 0.851.
Under D65 light source, the matching degree of the data measured by the experimental device and the data measured by BYKmac is close to the matching degree of the data measured by the human eye. Under the A light source, the matching degree between the measured data and the visual data of the experimental device is better than that of BYKmac.
The research paper is introduced here, let's take a look at the three Angle spectrophotometric colorimeter CS-390/392 developed by color spectrum technology for automobile paint, the instrument is specially applied to metal paint, automobile paint and the effect of the surface paint with particles and other industries color detection.
The instrument can measure the color data of 15°, 45° and 110° angles. The instrument is small, light and easy to operate. In the automobile paint industry, the instrument can also be combined with the automobile repair formula color measurement software, which can greatly improve the accuracy of color matching and retrieval ability, and improve the efficiency of automobile repair.