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Light Intensity Automatic Adjustment Technology and Its Application in Palmprint Recognition System

机译：光强度自动调整技术及其在掌纹识别系统中的应用

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摘要

Palmprint acquisition device with constant light intensity is easily influenced by the ambient light. The phenomenon that the captured palmprint images are too bright or dark happens frequently, and it leads to the failure of key points location. In order to ensure the captured palmprint image can obtain a good quality, an automatic light intensity adjustment system based on PWM Control Technology is designed. It can make proper adjustments for the light source according to quality evaluation results of the current image. In our study, a new palmprint dataset was established under different light intensity levels. Then, an optimal mean gray interval is learned from the dataset. Finally, the automatic light control module is designed to guarantee the brightness of the captured image falls into the optimal interval. Experimental results show that the technology is efficient for palmprint key points location and ROI (Region of Interest) segmentation, and it also commendably improves the palmprint recognition accuracy at the same time.
机译：具有恒定光强度的棕榈图采集装置容易受环境光影响。捕获的掌纹图像太亮或暗的现象经常发生，并且它导致关键点的失败。为了确保捕获的掌纹图像可以获得良好的质量，设计了一种基于PWM控制技术的自动光强度调节系统。它可以根据当前图像的质量评估结果对光源进行适当的调整。在我们的研究中，在不同的光强度水平下建立了一个新的Palmprint DataSet。然后，从数据集中学习最佳均值灰度间隔。最后，自动光控制模块旨在保证捕获图像的亮度落入最佳间隔。实验结果表明，该技术对于Palmprint关键点位置和ROI（兴趣区域）分割是有效的，并且它同时表彰了掌纹识别准确性。

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