1. A computerized method of determining posture information of an object in a two-dimensional height map captured by a range sensor system, the method comprising: receiving, at a slice generation module in a computing device, the height map of the object captured by the range sensor system; generating, by the slice generation module, a plurality of one-dimensional slices of the height map and a location record indicating locations of the plurality of one-dimensional slices on the height map; identifying, by a posture information generation module in the computing device, a location of at least one point of interest in the height map based on the plurality of one-dimensional slices and the location record; and determining, by the posture information generation module, the posture information of the object based on the location of the at least one point of interest in the height map.