A method for determining a depth of a target object in an environment is disclosed. The method comprises sensing a depth of objects within the environment with a depth sensing apparatus (1 10), identifying a disocclusion gap caused by the target object (120), detecting a position of edge contours of the disocclusion gap (1 30), and calculating a depth of the target object from the position of the disocclusion gap edge contours and a position of the depth sensing apparatus (140). Also disclosed are a computer program product for carrying out a method for determining a depth of a target object in an environment and an apparatus (300) for determining a depth of a target object in an environment.