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, wherein characterizing by the system the plurality of center pixels of the plurality of superpixels further comprises determining by the system a plurality of feature extraction regions using a three-stage process, wherein the centers of the plurality of feature extraction regions are 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.