GlobalBioIm is an open-source library to facilitate the implementation of models and algorithms in imaging, developed in the Biomedical Imaging Group. Its flexibility enables various applications such as fluorescence microscopy, magnetic resonance imaging (MRI), or X-ray tomography. In the past few years, recent advances in phase retrieval provide new algorithms to find x in the non-linear equation y = |Ax|^2. These new algorithms have only started to be applied in computational imaging. In this project, the student would implement and test these novel phase retrieval algorithms (spectral methods) in the GlobalBioIm library. This would help the student develop proficiency in MATLAB. This step would then enable a more exploratory study, with new applications in other imaging settings, thanks to the modularity of GlobalBioIm. Reference: Soubies, E., Soulez, F., Mccann, M. T., Pham, T. A., Donati, L., Debarre, T., ... & Unser, M. (2019). Pocket guide to solve inverse problems with GlobalBioIm. Inverse Problems, 35(10), 104006.