激光与光电子学进展, 2019, 56 (1): 011003, 网络出版: 2019-08-01
一种煤矿井下复杂光照条件下的人脸识别方法 下载: 1020次
Face Recognition Method Under Complex Light Conditions in Coal Mines
图像处理 小波变换 模糊处理 隶属度 重构 人脸识别 image processing wavelet transform fuzzy processing degree of membership reconstruction face recognition
摘要
为了解决煤矿井下复杂光照条件导致人脸识别率低的问题,提出了一种适用于煤矿井下复杂光照条件下的人脸识别方法。首先利用小波分解将人脸图像分解为低频和高频部分,对低频部分利用直方图均衡化处理,增强图像对比度;然后采用引入模糊隶属度因子的小波去噪模型对高频部分进行滤波处理,并通过新的PAL模糊增强算法对高频部分进行模糊增强,在不同阈值下的非线性变换得到不同尺度、不同方向的特征图像,并进行反模糊处理;最后对处理后的低频和高频部分进行小波重构。实验表明,在井下复杂光照条件下,本文提出的人脸识别方法能有效改善人脸图像的整体效果,增强图像的细节信息,且平均识别率能够达到94.45%,显著提高了井下复杂光照下的人脸识别率。
Abstract
In order to solve the problem of low face recognition rate caused by the complex lighting conditions in coal mines, a face recognition method applied to the underground coal mines with complex lighting conditions is proposed. First, the face image is decomposed into low-frequency and high-frequency components by wavelet decomposition, and simultaneously the histogram equalization processing is conducted on the low-frequency components to enhance the image contrast. Then, the wavelet denoising model with a fuzzy degree of membership factor is used to filter the high-frequency components and meanwhile a new PAL fuzzy enhancement algorithm is adopted for the fuzzy enhancement of high-frequency components. Under different thresholds, a non-linear transformation is used to get feature images with different scales and different directions, and the anti-fuzzy processing is conducted. Finally, the processed low-frequency and high-frequency components are reconstructed based on wavelets. The experimental results show that the proposed face recognition method can be used to effectively improve the overall effect of face images and enhance the detail information of images under the complex lighting conditions in underground coal mines. Moreover, the average recognition rate can reach 94.45%, indicating the face recognition rate under complex lighting conditions in coal mines is significantly enhanced.
霍跃华, 范伟强. 一种煤矿井下复杂光照条件下的人脸识别方法[J]. 激光与光电子学进展, 2019, 56(1): 011003. Yuehua Huo, Weiqiang Fan. Face Recognition Method Under Complex Light Conditions in Coal Mines[J]. Laser & Optoelectronics Progress, 2019, 56(1): 011003.