基于多尺度Retinex算法的光干涉条纹图像增强

Enhancement of Optical InterferometryFringe Patterns Based on Multiscale Retinex Algorithm

提出了一种基于多尺度Retinex算法的光干涉条纹图像增强算法,论述了该算法的原理以及实现过程。选取了大、中、小三种不同尺度,结合各个尺度的优点,针对光学干涉条纹图的特点,对不同的尺度取不同的权重。与两种常用的光学图像增强方法进行对比实验,并通过主观和客观的评价进一步说明本方法的有效性。实验结果表明,对于对比度低且光照不均匀的光干涉条纹图像,所提算法可以显著提高图像的可视性,改善光照不均匀的问题,克服照度不均匀给条纹图后续处理带来的困难。

An algorithm is proposed to enhance the optical interferometry fringe patterns based on the multiscale Retinex algorithm,and its principle and implementation are described.Three different scales,i.e.,large,medium,and small,are selected,and the advantages of each scale are combined.Further,different weights are considered for different scales according to the characteristics of the optical interferometry fringe patterns.Subsequently,the proposed method is compared with two commonly used optical interferometry fringe pattern enhancement methods by the experiment,and the effectiveness of the proposed method is demonstrated through subjective and objective evaluations.The experimental results denote that the algorithm proposed in this study can significantly improve the visibility of the fringe patterns exhibiting low contrast and overcome the difficulty associated with the subsequent processing of fringe patterns owing to uneven illumination.