Method and system for characterising microorganisms by digital holographic microscopy

Abstract

The invention relates to a method for characterising microorganisms which comprises: A. for each wavelength of a predetermined set of wavelengths comprising at least one wavelength, acquiring a holographic digital image, generating a focused image by computer means, each pixel of which image comprises an amplitude value and a phase value, and segmenting the focused image so as to extract portions corresponding to microorganisms; and B. characterising the microorganisms by computer means, according to the focused image portions. According to the invention, prior to the characterisation or prior to the segmentation or prior to the generation of the focused image, the method comprises correcting optical aberrations of the acquisition device by computer means, and the characterisation of the microorganisms comprises applying a digital model to these portions having as descriptors the amplitude and / or phase values of each wavelength of the predetermined set of wavelengths.

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