Simulation of Saddle-Shaped Optical Fringe Patterns

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MATLAB simulation for generating saddle-shaped optical fringe patterns, including fringe orientation extraction, binarization to obtain coarse wrapped phase maps and centerline diagrams. These techniques provide significant guidance for phase unwrapping in Electronic Speckle Pattern Interferometry (ESPI) and Radar Interferometry (INSAR) applications, employing gradient-based orientation calculation and morphological processing algorithms.

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This article presents a MATLAB-based simulation method for generating saddle-shaped optical fringe patterns. The implementation involves calculating fringe orientations using gradient operators (such as Sobel or Prewitt filters), followed by binarization processing to extract coarse wrapped phase maps and centerline diagrams through thresholding and skeletonization algorithms. These processing steps are crucial for phase unwrapping procedures in both Electronic Speckle Pattern Interferometry (ESPI) and Radar Interferometry (INSAR) image analysis. By implementing orientation field estimation and morphological operations, we can effectively guide the removal of phase wrapping artifacts in such images. Therefore, understanding and mastering these algorithmic steps through MATLAB coding practices is essential for processing this category of interferometric images.

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