Quantitative phase imaging (QPI) is a powerful label-free imaging technique that enables high-resolution, three-dimensional imaging of unlabeled samples by exploiting refractive index (RI) distributions as intrinsic imaging contrast. In this talk, we present the latest developments in 2D, 3D QPI techniques in visible1-3 and X-ray wavelengths. We will elucidate the principles of various QPI techniques, detail the reconstruction algorithms involved, and explore the enhancement of image analysis through machine learning algorithms. Moreover, we will delve into potential applications, spanning cell biology, biotechnology, and industrial inspections in fields such as semiconductors and display devices.
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