英文關鍵字
background
caucasian
chroma
compositing
cut
cutout
digital
finger
foreground
gesture
gestures
gesturing
green
greenscreen
hand
isolated
key
keyed
keying
man
matte
modern
monitor
multitouch
one
pointing
screen
scroll
sensor
swipe
tap
tapping
technology
touch
touchpad
touchscreen
trackpad