Computer and Automation Research Institute, Hungarian Academy of Sciences, Lágymányosi u 11, 1111 Budapest, Hungary.|Computer and Automation Research Institute, Hungarian Academy of Sciences, Lágymányosi u 11, 1111 Budapest, Hungary.|Computer and Automation Research Institute, Hungarian Academy of Sciences, Lágymányosi u 11, 1111 Budapest, Hungary.|Computer and Automation Research Institute, Hungarian Academy of Sciences, Lágymányosi u 11, 1111 Budapest, Hungary.