激光无损检测中基于调制度的图像自适应滤波研究

激光散斑图像在成像时不可避免地受噪声乘性调制,因此去除噪声是激光散斑图像处理的一项重要任务.本文在分析和对比了不同滤波算法的特点之后,基于调制度能够度量像素可靠程度,结合均值滤波,提出了基于调制度的条纹图像自适应均值滤波算法,并将其应用在激光无损检测图像去噪中,实验结果表明该算法优于普通的均值滤波,在抑制散斑噪声的同时有效保护了边缘等细节信息.

Study on Adaptive Filter Based on the Modulation in the Laser Non-destructive Testing

Noise is inevitably involved in laser speckle images when imaging.It is an important issue to remove the noise.After analysis and comparison the features of different filters,this paper provides an adaptive filter of fringe pattern based on the modulation,and applied in the laser non-destructive testing.The experimental results showed that the adaptive filter was superior to traditional average filtering in the field of noise removal in speckle images.