Contrast enhancement in microscopy of human thyroid tumors by means of acousto-optic adaptive spatial filtering

We report a method for edge enhancement in the images of transparent samples using analog image processing in coherent light. The experimental technique is based on adaptive spatial filtering with an acoustooptic tunable filter in a telecentric optical system. We demonstrate processing of microscopic images of unstained and stained histological sections of human thyroid tumor with improved contrast. 

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