Multiview 2D object recognition   ?
▪-airplane
▫-bathtub
▬-bed
▭-bench
▮-bookshelf
▯-bottle
▰-bowl
▱-car
▲-chair
△-cone
▴-cup
▵-curtain
▶-desk
▷-door
▸-dresser
▹-flower_pot
►-glass_box
▻-guitar
▼-keyboard
▽-lamp
▾-laptop
▿-mantel
◀-monitor
◁-night_stand
◂-person
◃-piano
◄-plant
◅-radio
◆-range_hood
◇-sink
◈-sofa
◉-stairs
◊-stool
○-table
◌-tent
◍-toilet
◎-tv_stand
●-vase
◐-wardrobe
◑-xbox