1. A method of image labeling comprising: receiving at least one image; computing, by a first stage predictor, at least one global parameter of the image; and modifying an image labeling process according to the computed global parameter, the at least one global parameter being one of: a game context action, age, and gender, modifying the image labeling process including dynamically modifying a second stage predictor using the computed global parameter; wherein computing the global parameter comprises: selecting a subset of image elements in the image; for each selected image element determining a probability that the image element depicts an object having a specified global parameter; and combining the probability from a plurality of the selected image elements to compute an estimate of the global parameter, wherein computing the global parameter also includes ensuring all available global parameter values are associated with a non-zero probability.