1. A classification apparatus for pathologic diagnosis of medical image for, comprising: a feature extraction unit configured to extract feature data for an input image using a feature extraction variable; a feature vector transformation unit configured to transform the extracted feature data into a feature vector using a vector transform variable; and a vector classification unit configured to classify the feature vector using a classification variable, and to output results of the classification of pathologic diagnosis for the input image; wherein the feature extraction unit, the feature vector transformation unit and the vector classification unit are trained based on a first tagged image having a first tag indicative of presence or absence of a lesion and pathologic diagnosis information, a second tagged image having a first tag as well as a second tag indicative of location information of the lesion, and an image having no tag.