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process_frame.py
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import time
import cv2
import numpy as np
from utils import find_angle, get_landmark_features, draw_text, draw_dotted_line
class ProcessFrame:
def __init__(self, thresholds, flip_frame = False):
# Set if frame should be flipped or not.
self.flip_frame = flip_frame
# self.thresholds
self.thresholds = thresholds
# Font type.
self.font = cv2.FONT_HERSHEY_SIMPLEX
# line type
self.linetype = cv2.LINE_AA
# set radius to draw arc
self.radius = 20
# Colors in BGR format.
self.COLORS = {
'blue' : (0, 127, 255),
'red' : (255, 50, 50),
'green' : (0, 255, 127),
'light_green': (100, 233, 127),
'yellow' : (255, 255, 0),
'magenta' : (255, 0, 255),
'white' : (255,255,255),
'cyan' : (0, 255, 255),
'light_blue' : (102, 204, 255)
}
# Dictionary to maintain the various landmark features.
self.dict_features = {}
self.left_features = {
'shoulder': 11,
'elbow' : 13,
'wrist' : 15,
'hip' : 23,
'knee' : 25,
'ankle' : 27,
'foot' : 31
}
self.right_features = {
'shoulder': 12,
'elbow' : 14,
'wrist' : 16,
'hip' : 24,
'knee' : 26,
'ankle' : 28,
'foot' : 32
}
self.dict_features['left'] = self.left_features
self.dict_features['right'] = self.right_features
self.dict_features['nose'] = 0
# For tracking counters and sharing states in and out of callbacks.
self.state_tracker = {
'state_seq': [],
'start_inactive_time': time.perf_counter(),
'start_inactive_time_front': time.perf_counter(),
'INACTIVE_TIME': 0.0,
'INACTIVE_TIME_FRONT': 0.0,
# 0 --> Bend Backwards, 1 --> Bend Forward, 2 --> Keep shin straight, 3 --> Deep squat
'DISPLAY_TEXT' : np.full((4,), False),
'COUNT_FRAMES' : np.zeros((4,), dtype=np.int64),
'LOWER_HIPS': False,
'INCORRECT_POSTURE': False,
'prev_state': None,
'curr_state':None,
'SQUAT_COUNT': 0,
'IMPROPER_SQUAT':0
}
self.FEEDBACK_ID_MAP = {
0: ('BEND BACKWARDS', 215, (0, 153, 255)),
1: ('BEND FORWARD', 215, (0, 153, 255)),
2: ('KNEE FALLING OVER TOE', 170, (255, 80, 80)),
3: ('SQUAT TOO DEEP', 125, (255, 80, 80))
}
def _get_state(self, knee_angle):
knee = None
if self.thresholds['HIP_KNEE_VERT']['NORMAL'][0] <= knee_angle <= self.thresholds['HIP_KNEE_VERT']['NORMAL'][1]:
knee = 1
elif self.thresholds['HIP_KNEE_VERT']['TRANS'][0] <= knee_angle <= self.thresholds['HIP_KNEE_VERT']['TRANS'][1]:
knee = 2
elif self.thresholds['HIP_KNEE_VERT']['PASS'][0] <= knee_angle <= self.thresholds['HIP_KNEE_VERT']['PASS'][1]:
knee = 3
return f's{knee}' if knee else None
def _update_state_sequence(self, state):
if state == 's2':
if (('s3' not in self.state_tracker['state_seq']) and (self.state_tracker['state_seq'].count('s2'))==0) or \
(('s3' in self.state_tracker['state_seq']) and (self.state_tracker['state_seq'].count('s2')==1)):
self.state_tracker['state_seq'].append(state)
elif state == 's3':
if (state not in self.state_tracker['state_seq']) and 's2' in self.state_tracker['state_seq']:
self.state_tracker['state_seq'].append(state)
def _show_feedback(self, frame, c_frame, dict_maps, lower_hips_disp):
if lower_hips_disp:
draw_text(
frame,
'LOWER YOUR HIPS',
pos=(30, 80),
text_color=(0, 0, 0),
font_scale=0.6,
text_color_bg=(255, 255, 0)
)
for idx in np.where(c_frame)[0]:
draw_text(
frame,
dict_maps[idx][0],
pos=(30, dict_maps[idx][1]),
text_color=(255, 255, 230),
font_scale=0.6,
text_color_bg=dict_maps[idx][2]
)
return frame
def process(self, frame: np.array, pose):
play_sound = None
frame_height, frame_width, _ = frame.shape
# Process the image.
keypoints = pose.process(frame)
if keypoints.pose_landmarks:
ps_lm = keypoints.pose_landmarks
nose_coord = get_landmark_features(ps_lm.landmark, self.dict_features, 'nose', frame_width, frame_height)
left_shldr_coord, left_elbow_coord, left_wrist_coord, left_hip_coord, left_knee_coord, left_ankle_coord, left_foot_coord = \
get_landmark_features(ps_lm.landmark, self.dict_features, 'left', frame_width, frame_height)
right_shldr_coord, right_elbow_coord, right_wrist_coord, right_hip_coord, right_knee_coord, right_ankle_coord, right_foot_coord = \
get_landmark_features(ps_lm.landmark, self.dict_features, 'right', frame_width, frame_height)
offset_angle = find_angle(left_shldr_coord, right_shldr_coord, nose_coord)
if offset_angle > self.thresholds['OFFSET_THRESH']:
display_inactivity = False
end_time = time.perf_counter()
self.state_tracker['INACTIVE_TIME_FRONT'] += end_time - self.state_tracker['start_inactive_time_front']
self.state_tracker['start_inactive_time_front'] = end_time
if self.state_tracker['INACTIVE_TIME_FRONT'] >= self.thresholds['INACTIVE_THRESH']:
self.state_tracker['SQUAT_COUNT'] = 0
self.state_tracker['IMPROPER_SQUAT'] = 0
display_inactivity = True
cv2.circle(frame, nose_coord, 7, self.COLORS['white'], -1)
cv2.circle(frame, left_shldr_coord, 7, self.COLORS['yellow'], -1)
cv2.circle(frame, right_shldr_coord, 7, self.COLORS['magenta'], -1)
if self.flip_frame:
frame = cv2.flip(frame, 1)
if display_inactivity:
# cv2.putText(frame, 'Resetting SQUAT_COUNT due to inactivity!!!', (10, frame_height - 90),
# self.font, 0.5, self.COLORS['blue'], 2, lineType=self.linetype)
play_sound = 'reset_counters'
self.state_tracker['INACTIVE_TIME_FRONT'] = 0.0
self.state_tracker['start_inactive_time_front'] = time.perf_counter()
draw_text(
frame,
"CORRECT: " + str(self.state_tracker['SQUAT_COUNT']),
pos=(int(frame_width*0.68), 30),
text_color=(255, 255, 230),
font_scale=0.7,
text_color_bg=(18, 185, 0)
)
draw_text(
frame,
"INCORRECT: " + str(self.state_tracker['IMPROPER_SQUAT']),
pos=(int(frame_width*0.68), 80),
text_color=(255, 255, 230),
font_scale=0.7,
text_color_bg=(221, 0, 0),
)
draw_text(
frame,
'CAMERA NOT ALIGNED PROPERLY!!!',
pos=(30, frame_height-60),
text_color=(255, 255, 230),
font_scale=0.65,
text_color_bg=(255, 153, 0),
)
draw_text(
frame,
'OFFSET ANGLE: '+str(offset_angle),
pos=(30, frame_height-30),
text_color=(255, 255, 230),
font_scale=0.65,
text_color_bg=(255, 153, 0),
)
# Reset inactive times for side view.
self.state_tracker['start_inactive_time'] = time.perf_counter()
self.state_tracker['INACTIVE_TIME'] = 0.0
self.state_tracker['prev_state'] = None
self.state_tracker['curr_state'] = None
# Camera is aligned properly.
else:
self.state_tracker['INACTIVE_TIME_FRONT'] = 0.0
self.state_tracker['start_inactive_time_front'] = time.perf_counter()
dist_l_sh_hip = abs(left_foot_coord[1]- left_shldr_coord[1])
dist_r_sh_hip = abs(right_foot_coord[1] - right_shldr_coord)[1]
shldr_coord = None
elbow_coord = None
wrist_coord = None
hip_coord = None
knee_coord = None
ankle_coord = None
foot_coord = None
if dist_l_sh_hip > dist_r_sh_hip:
shldr_coord = left_shldr_coord
elbow_coord = left_elbow_coord
wrist_coord = left_wrist_coord
hip_coord = left_hip_coord
knee_coord = left_knee_coord
ankle_coord = left_ankle_coord
foot_coord = left_foot_coord
multiplier = -1
else:
shldr_coord = right_shldr_coord
elbow_coord = right_elbow_coord
wrist_coord = right_wrist_coord
hip_coord = right_hip_coord
knee_coord = right_knee_coord
ankle_coord = right_ankle_coord
foot_coord = right_foot_coord
multiplier = 1
# ------------------- Verical Angle calculation --------------
hip_vertical_angle = find_angle(shldr_coord, np.array([hip_coord[0], 0]), hip_coord)
cv2.ellipse(frame, hip_coord, (30, 30),
angle = 0, startAngle = -90, endAngle = -90+multiplier*hip_vertical_angle,
color = self.COLORS['white'], thickness = 3, lineType = self.linetype)
draw_dotted_line(frame, hip_coord, start=hip_coord[1]-80, end=hip_coord[1]+20, line_color=self.COLORS['blue'])
knee_vertical_angle = find_angle(hip_coord, np.array([knee_coord[0], 0]), knee_coord)
cv2.ellipse(frame, knee_coord, (20, 20),
angle = 0, startAngle = -90, endAngle = -90-multiplier*knee_vertical_angle,
color = self.COLORS['white'], thickness = 3, lineType = self.linetype)
draw_dotted_line(frame, knee_coord, start=knee_coord[1]-50, end=knee_coord[1]+20, line_color=self.COLORS['blue'])
ankle_vertical_angle = find_angle(knee_coord, np.array([ankle_coord[0], 0]), ankle_coord)
cv2.ellipse(frame, ankle_coord, (30, 30),
angle = 0, startAngle = -90, endAngle = -90 + multiplier*ankle_vertical_angle,
color = self.COLORS['white'], thickness = 3, lineType=self.linetype)
draw_dotted_line(frame, ankle_coord, start=ankle_coord[1]-50, end=ankle_coord[1]+20, line_color=self.COLORS['blue'])
# ------------------------------------------------------------
# Join landmarks.
cv2.line(frame, shldr_coord, elbow_coord, self.COLORS['light_blue'], 4, lineType=self.linetype)
cv2.line(frame, wrist_coord, elbow_coord, self.COLORS['light_blue'], 4, lineType=self.linetype)
cv2.line(frame, shldr_coord, hip_coord, self.COLORS['light_blue'], 4, lineType=self.linetype)
cv2.line(frame, knee_coord, hip_coord, self.COLORS['light_blue'], 4, lineType=self.linetype)
cv2.line(frame, ankle_coord, knee_coord,self.COLORS['light_blue'], 4, lineType=self.linetype)
cv2.line(frame, ankle_coord, foot_coord, self.COLORS['light_blue'], 4, lineType=self.linetype)
# Plot landmark points
cv2.circle(frame, shldr_coord, 7, self.COLORS['yellow'], -1, lineType=self.linetype)
cv2.circle(frame, elbow_coord, 7, self.COLORS['yellow'], -1, lineType=self.linetype)
cv2.circle(frame, wrist_coord, 7, self.COLORS['yellow'], -1, lineType=self.linetype)
cv2.circle(frame, hip_coord, 7, self.COLORS['yellow'], -1, lineType=self.linetype)
cv2.circle(frame, knee_coord, 7, self.COLORS['yellow'], -1, lineType=self.linetype)
cv2.circle(frame, ankle_coord, 7, self.COLORS['yellow'], -1, lineType=self.linetype)
cv2.circle(frame, foot_coord, 7, self.COLORS['yellow'], -1, lineType=self.linetype)
current_state = self._get_state(int(knee_vertical_angle))
self.state_tracker['curr_state'] = current_state
self._update_state_sequence(current_state)
# -------------------------------------- COMPUTE COUNTERS --------------------------------------
if current_state == 's1':
if len(self.state_tracker['state_seq']) == 3 and not self.state_tracker['INCORRECT_POSTURE']:
self.state_tracker['SQUAT_COUNT']+=1
play_sound = str(self.state_tracker['SQUAT_COUNT'])
elif 's2' in self.state_tracker['state_seq'] and len(self.state_tracker['state_seq'])==1:
self.state_tracker['IMPROPER_SQUAT']+=1
play_sound = 'incorrect'
elif self.state_tracker['INCORRECT_POSTURE']:
self.state_tracker['IMPROPER_SQUAT']+=1
play_sound = 'incorrect'
self.state_tracker['state_seq'] = []
self.state_tracker['INCORRECT_POSTURE'] = False
# ----------------------------------------------------------------------------------------------------
# -------------------------------------- PERFORM FEEDBACK ACTIONS --------------------------------------
else:
if hip_vertical_angle > self.thresholds['HIP_THRESH'][1]:
self.state_tracker['DISPLAY_TEXT'][0] = True
elif hip_vertical_angle < self.thresholds['HIP_THRESH'][0] and \
self.state_tracker['state_seq'].count('s2')==1:
self.state_tracker['DISPLAY_TEXT'][1] = True
if self.thresholds['KNEE_THRESH'][0] < knee_vertical_angle < self.thresholds['KNEE_THRESH'][1] and \
self.state_tracker['state_seq'].count('s2')==1:
self.state_tracker['LOWER_HIPS'] = True
elif knee_vertical_angle > self.thresholds['KNEE_THRESH'][2]:
self.state_tracker['DISPLAY_TEXT'][3] = True
self.state_tracker['INCORRECT_POSTURE'] = True
if (ankle_vertical_angle > self.thresholds['ANKLE_THRESH']):
self.state_tracker['DISPLAY_TEXT'][2] = True
self.state_tracker['INCORRECT_POSTURE'] = True
# ----------------------------------------------------------------------------------------------------
# ----------------------------------- COMPUTE INACTIVITY ---------------------------------------------
display_inactivity = False
if self.state_tracker['curr_state'] == self.state_tracker['prev_state']:
end_time = time.perf_counter()
self.state_tracker['INACTIVE_TIME'] += end_time - self.state_tracker['start_inactive_time']
self.state_tracker['start_inactive_time'] = end_time
if self.state_tracker['INACTIVE_TIME'] >= self.thresholds['INACTIVE_THRESH']:
self.state_tracker['SQUAT_COUNT'] = 0
self.state_tracker['IMPROPER_SQUAT'] = 0
display_inactivity = True
else:
self.state_tracker['start_inactive_time'] = time.perf_counter()
self.state_tracker['INACTIVE_TIME'] = 0.0
# -------------------------------------------------------------------------------------------------------
hip_text_coord_x = hip_coord[0] + 10
knee_text_coord_x = knee_coord[0] + 15
ankle_text_coord_x = ankle_coord[0] + 10
if self.flip_frame:
frame = cv2.flip(frame, 1)
hip_text_coord_x = frame_width - hip_coord[0] + 10
knee_text_coord_x = frame_width - knee_coord[0] + 15
ankle_text_coord_x = frame_width - ankle_coord[0] + 10
if 's3' in self.state_tracker['state_seq'] or current_state == 's1':
self.state_tracker['LOWER_HIPS'] = False
self.state_tracker['COUNT_FRAMES'][self.state_tracker['DISPLAY_TEXT']]+=1
frame = self._show_feedback(frame, self.state_tracker['COUNT_FRAMES'], self.FEEDBACK_ID_MAP, self.state_tracker['LOWER_HIPS'])
if display_inactivity:
# cv2.putText(frame, 'Resetting COUNTERS due to inactivity!!!', (10, frame_height - 20), self.font, 0.5, self.COLORS['blue'], 2, lineType=self.linetype)
play_sound = 'reset_counters'
self.state_tracker['start_inactive_time'] = time.perf_counter()
self.state_tracker['INACTIVE_TIME'] = 0.0
cv2.putText(frame, str(int(hip_vertical_angle)), (hip_text_coord_x, hip_coord[1]), self.font, 0.6, self.COLORS['light_green'], 2, lineType=self.linetype)
cv2.putText(frame, str(int(knee_vertical_angle)), (knee_text_coord_x, knee_coord[1]+10), self.font, 0.6, self.COLORS['light_green'], 2, lineType=self.linetype)
cv2.putText(frame, str(int(ankle_vertical_angle)), (ankle_text_coord_x, ankle_coord[1]), self.font, 0.6, self.COLORS['light_green'], 2, lineType=self.linetype)
draw_text(
frame,
"CORRECT: " + str(self.state_tracker['SQUAT_COUNT']),
pos=(int(frame_width*0.68), 30),
text_color=(255, 255, 230),
font_scale=0.7,
text_color_bg=(18, 185, 0)
)
draw_text(
frame,
"INCORRECT: " + str(self.state_tracker['IMPROPER_SQUAT']),
pos=(int(frame_width*0.68), 80),
text_color=(255, 255, 230),
font_scale=0.7,
text_color_bg=(221, 0, 0),
)
self.state_tracker['DISPLAY_TEXT'][self.state_tracker['COUNT_FRAMES'] > self.thresholds['CNT_FRAME_THRESH']] = False
self.state_tracker['COUNT_FRAMES'][self.state_tracker['COUNT_FRAMES'] > self.thresholds['CNT_FRAME_THRESH']] = 0
self.state_tracker['prev_state'] = current_state
else:
if self.flip_frame:
frame = cv2.flip(frame, 1)
end_time = time.perf_counter()
self.state_tracker['INACTIVE_TIME'] += end_time - self.state_tracker['start_inactive_time']
display_inactivity = False
if self.state_tracker['INACTIVE_TIME'] >= self.thresholds['INACTIVE_THRESH']:
self.state_tracker['SQUAT_COUNT'] = 0
self.state_tracker['IMPROPER_SQUAT'] = 0
# cv2.putText(frame, 'Resetting SQUAT_COUNT due to inactivity!!!', (10, frame_height - 25), self.font, 0.7, self.COLORS['blue'], 2)
display_inactivity = True
self.state_tracker['start_inactive_time'] = end_time
draw_text(
frame,
"CORRECT: " + str(self.state_tracker['SQUAT_COUNT']),
pos=(int(frame_width*0.68), 30),
text_color=(255, 255, 230),
font_scale=0.7,
text_color_bg=(18, 185, 0)
)
draw_text(
frame,
"INCORRECT: " + str(self.state_tracker['IMPROPER_SQUAT']),
pos=(int(frame_width*0.68), 80),
text_color=(255, 255, 230),
font_scale=0.7,
text_color_bg=(221, 0, 0),
)
if display_inactivity:
play_sound = 'reset_counters'
self.state_tracker['start_inactive_time'] = time.perf_counter()
self.state_tracker['INACTIVE_TIME'] = 0.0
# Reset all other state variables
self.state_tracker['prev_state'] = None
self.state_tracker['curr_state'] = None
self.state_tracker['INACTIVE_TIME_FRONT'] = 0.0
self.state_tracker['INCORRECT_POSTURE'] = False
self.state_tracker['DISPLAY_TEXT'] = np.full((5,), False)
self.state_tracker['COUNT_FRAMES'] = np.zeros((5,), dtype=np.int64)
self.state_tracker['start_inactive_time_front'] = time.perf_counter()
return frame, play_sound