Fig. 2From: SARS-CoV-2: preliminary study of infected human nasopharyngeal tissue by high resolution microscopyImprovement and segmentation of coronavirus images by mathematics algorithm. Microphotograph performed with an electronic scanning microscope of the apical surface of an epithelial cell of the nasal mucosa. a Original images; b improved images by mathematics algorithm where S-spikes are more visible, refining the urchin-shape in all virion particles. Bar 1 µmBack to article page