Table 1: Finger posture and the respective distance criteria.
Parameters Description Initialized value
rowmax The maximum number of row in the image or the image height. 480
colmax The maximum number of column in the image or the image width. 360
pmin The minimum possible pixels deviation from each hand feature such as finger webs, minima points, etc. rpalm/6
kth The ratio of thumb distance to palm radius. 1.1rpalm
kin The ratio of index finger distance to palm radius. 0.45 rpalm
kmi The ratio of middle finger distance to palm radius. 0.45 rpalm
kri The ratio of ring finger distance to palm radius. 0.9 rpalm
kraised The minimum distance between fingertip to palm center for the finger to be considered raised 2.4 rpalm
kbent The minimum distance between fingertip to palm center for the finger to be considered half-raised 1.6 rpalm
kth-raised The minimum distance between thumb fingertip to palm center for the thumb to be considered raised 1.6 rpalm
kpi-raised The minimum distance between pinky fingertip to palm center for the pinky to be considered raised 1.6 rpalm
kdef-dist The minimum distance between defect point to palm center for the defect to be considered belonging to a pair of fingers in adjacent to each other. 1.8 rpalm
ktip-dist The maximum distance between two close by hand feature, i.e. fingertip with fingertip or fingertip with finger web. 0.8 rpalm
kth-fist The minimum distance of thumb to be considered raised in fist posture. 1.5 rpalm
across The maximum angle of deviation before it is considered as finger crossed 55˚
is_signK The flag to differentiate between sign ‘K’ and ‘V’. true / false
is_signR The flag to differentiate between sign ‘R’ and ‘U’. true / false
is_signS The flag to indicate sign ‘S’. true / false
is_vertical The flag when true indicates the yaw orientation of hand is in upright position. true / false
is_roll The flag when true indicates the hand is in roll and horizontal yaw orientation. true / false
is_motion The flag when true indicates motion is detected. Trajectory points will be tracked. true / false
stop Frame Count The counter of Frames stop motion. 0