1. A computer implemented method for increasing the signal to noise ratio in digital pathology image data to be processed by a digital pathology image analysis algorithm, where one or more processors are programmed to perform steps comprising: receiving an identification of a digital slide image, a classifier associated with a desired characteristic, and an image analysis algorithm; analyzing the identified digital slide image using the identified classifier to generate a metadata mask that identifies digital slide image data corresponding to the desired characteristic; applying the metadata mask to the identified digital slide image to obtain image data from the identified digital slide image that includes the desired characteristic in accordance with the classifier; and processing the obtained image data that includes the desired characteristic in accordance with the classifier using the identified image analysis algorithm to generate an analysis of the digital slide image.