PROBLEM TO BE SOLVED: To suppress reduction of counting accuracy of colonies.;SOLUTION: A server device 10 receives a Petri dish image in which a single Petri dish containing bacteria colonies is photographed which is a Petri dish image associated with information indicating lapse time from start of culture regarding different photographing timing. Furthermore, the server device 10 counts the number of colonies regarding each of a plurality of Petri dish images for a single Petri dish by severally receiving the images. Furthermore, the server device 10 outputs the number of colonies counted from a first Petri dish image in the case where the first Petri dish image in which the information indicating lapse time is in the front has more of the counted number of colonies than a second Petri dish image in which the information indicating lapse time is in the rear.;COPYRIGHT: (C)2016,JPO&INPIT
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