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# micro_gestures.py
# routines for detecting single-frame micro-gestures
from utils import distance_between_points, is_finger_extended
def fist_closed(landmarks):
# all fingers curled into palm
return all(not is_finger_extended(landmarks, finger=f) for f in ["thumb","index","middle","ring","pinky"])
def palm_open(landmarks):
# all fingers extended
return all(is_finger_extended(landmarks, finger=f) for f in ["thumb","index","middle","ring","pinky"])
def index_pointing_up(landmarks):
# only index extended up
return is_finger_extended(landmarks, "index", "up") and all(not is_finger_extended(landmarks,f) for f in ["thumb","middle","ring","pinky"])
def v_sign(landmarks):
# index and middle extended, others curled
return is_finger_extended(landmarks, "index") and is_finger_extended(landmarks, "middle") and all(not is_finger_extended(landmarks,f) for f in ["thumb","ring","pinky"])
def thumb_up(landmarks):
# thumb up, others curled
return is_finger_extended(landmarks,"thumb","up") and all(not is_finger_extended(landmarks,f) for f in ["index","middle","ring","pinky"])
def thumb_side(landmarks):
# thumb horizontal, others curled
return is_finger_extended(landmarks,"thumb") and all(not is_finger_extended(landmarks,f) for f in ["index","middle","ring","pinky"])
def pinky_up(landmarks):
# only pinky extended up
return is_finger_extended(landmarks,"pinky","up") and all(not is_finger_extended(landmarks,f) for f in ["thumb","index","middle","ring"])
def four_fingers(landmarks):
# four fingers extended, thumb curled
return all(is_finger_extended(landmarks,f) for f in ["index","middle","ring","pinky"]) and not is_finger_extended(landmarks,"thumb")
def ok_sign(landmarks):
# thumb and index touching, others extended
thumb_tip = landmarks[4]
index_tip = landmarks[8]
return distance_between_points(thumb_tip,index_tip) < 0.05 and all(is_finger_extended(landmarks,f) for f in ["middle","ring","pinky"])
def palm_inward(landmarks):
# palm facing body (approximate using wrist-middle_finger vector)
wrist = landmarks[0]
mcp = landmarks[9]
vector_y = mcp[1] - wrist[1]
return vector_y > 0 # palm facing down or inward
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