1. A computer-implemented feature extraction method for generating a classification model for a digitized image, the method to be performed by a system comprising at least one processor and at least one memory, the method comprising: differentiating by the system the digitized image into a plurality of superpixels, each comprising a plurality of pixels, based on pixel characteristics; determining by the system a plurality of center pixels of the plurality of superpixels; characterizing by the system the plurality of center pixels of the plurality of superpixels; generating by the system a classification model by associating features of the plurality of center pixels with labels of a plurality of ground truths wherein the plurality of ground truths are associated with a plurality of image classifications; and outputting by the system a classification model for classifying all or some of the pixels of a second digitized image.