Abstract: A method includes: accessing a depth map, generated by a depth sensor arranged on a vehicle, including a set of pixels representing relative positions and radial velocities of surfaces relative to the depth sensor; correlating a cluster of pixels exhibiting congruent radial velocities with an object in the field of view of the depth sensor; aggregating the cluster of pixels into a three-dimensional object representation of the object; classifying the object into an object class based on congruence between the three-dimensional object representation and a geometry of the object class; characterizing motion of the object based on positions and radial velocities of surfaces represented by the cluster of pixels; and generating a motion command based on the motion of the object and a set of motion characteristics of the object class.