CT image of pneumonia

The dataset includes three categories: CAP, COVID and NonCOVID, NonCOVID represents CT images of healthy lungs, with clear lung textures, no abnormal lines, and symmetrical distribution of the thoracic cage on both sides. CAP represents a CT image of common pneumonia, which may have alveolar consolidation, hyperdense opacities, and unclear lesion margins. COVID stands for CT image of COVID-19, and the lungs may have patchy or segmental ground-glass opacities, which may be gridded in texture, with a few interlobar pleural thickenings. The initial data ratio was not balanced, so the images were augmented with data, including random cropping, horizontal flipping and other methods, and finally about 6000 images per category, and the number of samples was basically balanced.