Lin Q, Vesecky J F, Zebker H A
Appl Opt. 1994 Jan 10;33(2):201-8. doi: 10.1364/AO.33.000201.
Interferometric synthetic aperture radar presents a new technology for performing high-resolution topographic mapping. One of the factors critical to mapping accuracy is phase unwrapping. This paper presents a new algorithm that unwraps phase through fringe-line detection. The algorithm is effective in preventing error propagation, it preserves the image resolution, and, in the mean time, it produces negligible local errors. An edge-segment linking approach and a curve-fitting approach are investigated, and their performances are compared. Test results of the algorithm are shown with the actual interferometric SEASAT synthetic aperture radar images over large-relief terrain near Yellowstone National Park with a short baseline, and results are shown over relatively flat terrain in Death Valley of California with a long baseline.
干涉合成孔径雷达为进行高分辨率地形测绘提供了一项新技术。对测绘精度至关重要的因素之一是相位解缠。本文提出了一种通过条纹线检测来解缠相位的新算法。该算法能有效防止误差传播，保持图像分辨率，同时产生可忽略不计的局部误差。研究了一种边缘段链接方法和一种曲线拟合方法，并比较了它们的性能。用黄石国家公园附近大起伏地形且基线较短的实际干涉SEASAT合成孔径雷达图像展示了该算法的测试结果，还用加利福尼亚州死亡谷相对平坦地形且基线较长的图像展示了结果。
