This research was conducted to evaluate the effects of cold atmospheric plasma treatment on the color of Hyssop (Hyssopus officinalis L.) and also to compare the usage of the spectrophotometer vs the color imaging instrumentation for the evaluation of the treatment on the color parameters. The experiments were investigated at different treatment times of 1, 5, and 10 minutes and the voltage values of 17, 20, and 23 kV. Possible changes of color were evaluated by using CIE L*a*b* values obtained with HunterLab colorimeter and CIE L*a*b* values obtained with a digital still camera (DSC) using digital image processing (MATLAB software). The values of L*, a*, and b* of the samples were obtained using both the methods. The results revealed that the L*, a*, and b* values of the treated Hyssop samples changed with increasing the treatment time and the voltage applied. Evaluating the interaction effects revealed that there was a significant difference in the (−a^*/b^*) ratio. In addition, the results showed that the effects of all variables on the color parameters were significantly different in the case of the DSC using digital image processing. However, these effects were not significantly different using HunterLab colorimeter except for time variable and interaction effects of a* and (−a^*/b^*) ratio. The lightest green color and the maximum chlorophyll content loss were observed for 23 kV applied over 10 minutes. Based on the results, the digital image processing can be used as a practical tool to study the variations at the color of dried Hyssop leaves after cold plasma treatment.

中文翻译：

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彩色成像仪器和分光光度计对冷血浆对猪膝草颜色参数的影响

进行了这项研究，以评估冷等离子体处理对Hyssop（Hyssopus officinalis L.）颜色的影响，并比较了分光光度计和彩色成像仪器在颜色参数评估上的使用效果。在1、5和10分钟的不同处理时间以及17、20和23 kV的电压值下对实验进行了研究。颜色的可能的变化，通过使用CIE评价大号*一个* b *使用HunterLab色度计和获得的值CIE大号*一个* b *使用数字图像处理（MATLAB软件）的数字静止照相机（DSC）获得的值。的值使用这两种方法均可得到样品的L *，a *和b *。结果表明，处理的Hysop样品的L *，a *和b *值随处理时间和施加电压的增加而变化。评估相互作用效应表明，（- a ^* / b ^*）比率。此外，结果表明，在使用数字图像处理的DSC情况下，所有变量对颜色参数的影响都明显不同。然而，这些效果不显著不同使用Hunterlab色以外的时间变量和相互作用效应一个*和（-一个^* / b ^*）比。在10分钟内施加23 kV电压时，观察到最浅的绿色和最大的叶绿素含量损失。根据结果​​，数字图像处理可以用作研究冷等离子处理后干燥的Hyssop叶颜色变化的实用工具。