We describe an extended algorithm for the analysis of the interferograms of complex-structured phase objects, capable of processing the fringes with negative curvature. The algorithm implements nonlinear locally-adaptive processing of interference images, which is based on the analysis of the distribution, variance, and increment of intensity in different directions at each point of the image. The employed algorithm allows iterative removal of noise and distortions without loss in the fringe contrast as well as provides a means to determine the local path of each fringe. The method for the search of extreme points with an account of the intensity behavior in different directions is described together with the criteria of drawing lines (fringe traces) connecting these points. The extended algorithm is tested in the context of analyzing the interference patterns of complex-structured spark channels developing from the surface of a point cathode in ambient air.

我们描述了一种扩展的算法，用于分析复杂结构的相位对象的干涉图，能够处理具有负曲率的条纹。该算法基于对图像各点不同方向上强度的分布，方差和增量的分析，实现了干涉图像的非线性局部自适应处理。所采用的算法允许迭代地去除噪声和失真，而不会降低条纹对比度，并且提供了一种确定每个条纹的局部路径的方法。描述了在极端方向上考虑不同方向上的强度行为的搜索方法以及连接这些点的绘制线（条纹痕迹）的标准。