An image processing device is provided with: a fluorescence-intensity- calculation unit for calculating the intensity of fluorescence in a fluorescence image in which the influence of fluorescence, from among the fluorescence generated by a living body irradiated with excitation light, other than that of an imaging plane has been removed； a fluorescence-intensity-distribution-creation unit for creating a three-dimensional fluorescence intensity distribution for the same living body from the fluorescence intensities of a plurality of fluorescence images that have been calculated by the fluorescence-intensity-calculation unit and that correspond to different cross sections of the same living body； a fluorescence-intensity-information-storage unit for storing fluorescence intensity information for a prescribed biological tissue and fluorescence intensity information for cells to be detected； a biological-tissue-identification unit for using the fluorescence intensity distribution created by the fluorescence-intensity-distribution-creation unit to identify a biological tissue that matches the fluorescence intensity information for the prescribed biological tissue read out from the fluorescence-intensity-information-storage unit； a cell identification unit for using the fluorescence intensity distribution created by the fluorescence-intensity-distribution- creation unit to identify, for each biological tissue identified by the biological-tissue-identification unit, cells that match the fluorescence intensity information for the cells to be detected read out from the fluorescence-intensity-information-storage unit； and a state determination unit for determining the state of the biological tissue on the basis of the cell information identified by the cell identification unit.La présente invention concerne un dispositif de traitement d'image qui comprend : une unité de calcul d'intensité de fluorescence pour calculer l'intensité de fluorescence sur une image de fluorescence
