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Geometric phase analysis
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<p>Geometric phase analysis is a method of <a href="/facts/Digital_signal_processing/PEG7azr8">digital signal processing</a> used to determine crystallographic quantities such as d-spacing or strain from <a href="/facts/High-resolution_transmission_electron_microscopy/L7B2oHyr">high-resolution transmission electron microscope</a> images. The analysis needs to be performed using specialized <a href="/facts/Computer_program/e38jH9N9">computer program</a>. </p>