1. A method for classifying tiles to be sent to a computer in a remote presentation session, a tile comprising a plurality of pixels, comprising: determining a first feature of a first pre-classified tile, the first feature comprising a numerical value that represents a characteristic of the plurality of pixels of the first pre-classified tile; using machine learning to determine a function for classifying a set of unclassified tiles, the machine learning determining the function based on a correspondence between the first feature and the classification of the first pre-classified tile; determining a second feature of a second pre-classified tile; verifying that providing the second feature as input to the function causes the function to output the classification of the second pre-classified tile; determining a third feature of an unclassified tile of the set of unclassified tiles; providing the third feature as input to the function, the function outputting a classification for the unclassified tile; and storing the classification for the unclassified tile in a memory.