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279 lines
13 KiB
279 lines
13 KiB
from math import atan2, sqrt
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from cereal import car
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from common.numpy_fast import interp
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from common.realtime import DT_DMON
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from selfdrive.hardware import TICI
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from common.filter_simple import FirstOrderFilter
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from common.stat_live import RunningStatFilter
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EventName = car.CarEvent.EventName
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# ******************************************************************************************
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# NOTE: To fork maintainers.
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# Disabling or nerfing safety features will get you and your users banned from our servers.
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# We recommend that you do not change these numbers from the defaults.
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# ******************************************************************************************
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class DRIVER_MONITOR_SETTINGS():
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def __init__(self, TICI=TICI, DT_DMON=DT_DMON):
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self._DT_DMON = DT_DMON
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self._AWARENESS_TIME = 35. # passive wheeltouch total timeout
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self._AWARENESS_PRE_TIME_TILL_TERMINAL = 12.
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self._AWARENESS_PROMPT_TIME_TILL_TERMINAL = 6.
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self._DISTRACTED_TIME = 11. # active monitoring total timeout
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self._DISTRACTED_PRE_TIME_TILL_TERMINAL = 8.
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self._DISTRACTED_PROMPT_TIME_TILL_TERMINAL = 6.
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self._FACE_THRESHOLD = 0.5
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self._PARTIAL_FACE_THRESHOLD = 0.75 if TICI else 0.5
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self._EYE_THRESHOLD = 0.5
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self._SG_THRESHOLD = 0.5
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self._BLINK_THRESHOLD = 0.88 if TICI else 0.5
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self._BLINK_THRESHOLD_SLACK = 0.98 if TICI else 0.65
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self._BLINK_THRESHOLD_STRICT = 0.88 if TICI else 0.5
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self._PITCH_WEIGHT = 1.175 if TICI else 1.35 # pitch matters a lot more
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self._POSESTD_THRESHOLD = 0.318 if TICI else 0.14
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self._E2E_POSE_THRESHOLD = 0.95 if TICI else 0.9
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self._E2E_EYES_THRESHOLD = 0.75
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self._METRIC_THRESHOLD = 0.5 if TICI else 0.4
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self._METRIC_THRESHOLD_SLACK = 0.6875 if TICI else 0.55
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self._METRIC_THRESHOLD_STRICT = 0.5 if TICI else 0.4
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self._PITCH_POS_ALLOWANCE = 0.12 # rad, to not be too sensitive on positive pitch
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self._PITCH_NATURAL_OFFSET = 0.02 # people don't seem to look straight when they drive relaxed, rather a bit up
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self._YAW_NATURAL_OFFSET = 0.08 # people don't seem to look straight when they drive relaxed, rather a bit to the right (center of car)
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self._HI_STD_FALLBACK_TIME = int(10 / self._DT_DMON) # fall back to wheel touch if model is uncertain for 10s
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self._DISTRACTED_FILTER_TS = 0.25 # 0.6Hz
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self._POSE_CALIB_MIN_SPEED = 13 # 30 mph
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self._POSE_OFFSET_MIN_COUNT = int(60 / self._DT_DMON) # valid data counts before calibration completes, 1min cumulative
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self._POSE_OFFSET_MAX_COUNT = int(360 / self._DT_DMON) # stop deweighting new data after 6 min, aka "short term memory"
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self._RECOVERY_FACTOR_MAX = 5. # relative to minus step change
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self._RECOVERY_FACTOR_MIN = 1.25 # relative to minus step change
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self._MAX_TERMINAL_ALERTS = 3 # not allowed to engage after 3 terminal alerts
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self._MAX_TERMINAL_DURATION = int(30 / self._DT_DMON) # not allowed to engage after 30s of terminal alerts
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# model output refers to center of cropped image, so need to apply the x displacement offset
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RESIZED_FOCAL = 320.0
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H, W, FULL_W = 320, 160, 426
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class DistractedType:
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NOT_DISTRACTED = 0
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BAD_POSE = 1
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BAD_BLINK = 2
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def face_orientation_from_net(angles_desc, pos_desc, rpy_calib, is_rhd):
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# the output of these angles are in device frame
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# so from driver's perspective, pitch is up and yaw is right
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pitch_net, yaw_net, roll_net = angles_desc
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face_pixel_position = ((pos_desc[0] + .5)*W - W + FULL_W, (pos_desc[1]+.5)*H)
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yaw_focal_angle = atan2(face_pixel_position[0] - FULL_W//2, RESIZED_FOCAL)
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pitch_focal_angle = atan2(face_pixel_position[1] - H//2, RESIZED_FOCAL)
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pitch = pitch_net + pitch_focal_angle
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yaw = -yaw_net + yaw_focal_angle
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# no calib for roll
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pitch -= rpy_calib[1]
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yaw -= rpy_calib[2] * (1 - 2 * int(is_rhd)) # lhd -> -=, rhd -> +=
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return roll_net, pitch, yaw
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class DriverPose():
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def __init__(self, max_trackable):
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self.yaw = 0.
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self.pitch = 0.
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self.roll = 0.
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self.yaw_std = 0.
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self.pitch_std = 0.
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self.roll_std = 0.
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self.pitch_offseter = RunningStatFilter(max_trackable=max_trackable)
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self.yaw_offseter = RunningStatFilter(max_trackable=max_trackable)
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self.low_std = True
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self.cfactor = 1.
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class DriverBlink():
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def __init__(self):
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self.left_blink = 0.
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self.right_blink = 0.
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self.cfactor = 1.
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class DriverStatus():
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def __init__(self, rhd=False, settings=DRIVER_MONITOR_SETTINGS()):
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# init policy settings
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self.settings = settings
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# init driver status
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self.is_rhd_region = rhd
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self.pose = DriverPose(self.settings._POSE_OFFSET_MAX_COUNT)
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self.pose_calibrated = False
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self.blink = DriverBlink()
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self.awareness = 1.
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self.awareness_active = 1.
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self.awareness_passive = 1.
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self.driver_distracted = False
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self.driver_distraction_filter = FirstOrderFilter(0., self.settings._DISTRACTED_FILTER_TS, self.settings._DT_DMON)
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self.face_detected = False
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self.face_partial = False
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self.terminal_alert_cnt = 0
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self.terminal_time = 0
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self.step_change = 0.
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self.active_monitoring_mode = True
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self.is_model_uncertain = False
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self.hi_stds = 0
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self.threshold_pre = self.settings._DISTRACTED_PRE_TIME_TILL_TERMINAL / self.settings._DISTRACTED_TIME
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self.threshold_prompt = self.settings._DISTRACTED_PROMPT_TIME_TILL_TERMINAL / self.settings._DISTRACTED_TIME
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self._set_timers(active_monitoring=True)
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def _set_timers(self, active_monitoring):
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if self.active_monitoring_mode and self.awareness <= self.threshold_prompt:
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if active_monitoring:
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self.step_change = self.settings._DT_DMON / self.settings._DISTRACTED_TIME
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else:
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self.step_change = 0.
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return # no exploit after orange alert
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elif self.awareness <= 0.:
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return
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if active_monitoring:
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# when falling back from passive mode to active mode, reset awareness to avoid false alert
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if not self.active_monitoring_mode:
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self.awareness_passive = self.awareness
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self.awareness = self.awareness_active
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self.threshold_pre = self.settings._DISTRACTED_PRE_TIME_TILL_TERMINAL / self.settings._DISTRACTED_TIME
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self.threshold_prompt = self.settings._DISTRACTED_PROMPT_TIME_TILL_TERMINAL / self.settings._DISTRACTED_TIME
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self.step_change = self.settings._DT_DMON / self.settings._DISTRACTED_TIME
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self.active_monitoring_mode = True
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else:
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if self.active_monitoring_mode:
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self.awareness_active = self.awareness
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self.awareness = self.awareness_passive
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self.threshold_pre = self.settings._AWARENESS_PRE_TIME_TILL_TERMINAL / self.settings._AWARENESS_TIME
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self.threshold_prompt = self.settings._AWARENESS_PROMPT_TIME_TILL_TERMINAL / self.settings._AWARENESS_TIME
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self.step_change = self.settings._DT_DMON / self.settings._AWARENESS_TIME
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self.active_monitoring_mode = False
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def _is_driver_distracted(self, pose, blink):
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if not self.pose_calibrated:
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pitch_error = pose.pitch - self.settings._PITCH_NATURAL_OFFSET
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yaw_error = pose.yaw - self.settings._YAW_NATURAL_OFFSET
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else:
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pitch_error = pose.pitch - self.pose.pitch_offseter.filtered_stat.mean()
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yaw_error = pose.yaw - self.pose.yaw_offseter.filtered_stat.mean()
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# positive pitch allowance
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if pitch_error > 0.:
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pitch_error = max(pitch_error - self.settings._PITCH_POS_ALLOWANCE, 0.)
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pitch_error *= self.settings._PITCH_WEIGHT
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pose_metric = sqrt(yaw_error**2 + pitch_error**2)
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if pose_metric > self.settings._METRIC_THRESHOLD*pose.cfactor:
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return DistractedType.BAD_POSE
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elif (blink.left_blink + blink.right_blink)*0.5 > self.settings._BLINK_THRESHOLD*blink.cfactor:
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return DistractedType.BAD_BLINK
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else:
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return DistractedType.NOT_DISTRACTED
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def set_policy(self, model_data):
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ep = min(model_data.meta.engagedProb, 0.8) / 0.8
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self.pose.cfactor = interp(ep, [0, 0.5, 1],
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[self.settings._METRIC_THRESHOLD_STRICT,
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self.settings. _METRIC_THRESHOLD,
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self.settings._METRIC_THRESHOLD_SLACK]) / self.settings._METRIC_THRESHOLD
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self.blink.cfactor = interp(ep, [0, 0.5, 1],
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[self.settings._BLINK_THRESHOLD_STRICT,
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self.settings._BLINK_THRESHOLD,
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self.settings._BLINK_THRESHOLD_SLACK]) / self.settings._BLINK_THRESHOLD
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def get_pose(self, driver_state, cal_rpy, car_speed, op_engaged):
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if not all(len(x) > 0 for x in [driver_state.faceOrientation, driver_state.facePosition,
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driver_state.faceOrientationStd, driver_state.facePositionStd]):
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return
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self.face_partial = driver_state.partialFace > self.settings._PARTIAL_FACE_THRESHOLD
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self.face_detected = driver_state.faceProb > self.settings._FACE_THRESHOLD or self.face_partial
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self.pose.roll, self.pose.pitch, self.pose.yaw = face_orientation_from_net(driver_state.faceOrientation, driver_state.facePosition, cal_rpy, self.is_rhd_region)
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self.pose.pitch_std = driver_state.faceOrientationStd[0]
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self.pose.yaw_std = driver_state.faceOrientationStd[1]
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# self.pose.roll_std = driver_state.faceOrientationStd[2]
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model_std_max = max(self.pose.pitch_std, self.pose.yaw_std)
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self.pose.low_std = model_std_max < self.settings._POSESTD_THRESHOLD and not self.face_partial
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self.blink.left_blink = driver_state.leftBlinkProb * (driver_state.leftEyeProb > self.settings._EYE_THRESHOLD) * (driver_state.sunglassesProb < self.settings._SG_THRESHOLD)
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self.blink.right_blink = driver_state.rightBlinkProb * (driver_state.rightEyeProb > self.settings._EYE_THRESHOLD) * (driver_state.sunglassesProb < self.settings._SG_THRESHOLD)
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distracted_normal = self._is_driver_distracted(self.pose, self.blink) > 0 and \
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driver_state.faceProb > self.settings._FACE_THRESHOLD and self.pose.low_std
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distracted_E2E = (driver_state.distractedPose > self.settings._E2E_POSE_THRESHOLD or driver_state.distractedEyes > self.settings._E2E_EYES_THRESHOLD) and \
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(self.face_detected and not self.face_partial)
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self.driver_distracted = distracted_normal or distracted_E2E
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self.driver_distraction_filter.update(self.driver_distracted)
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# update offseter
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# only update when driver is actively driving the car above a certain speed
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if self.face_detected and car_speed > self.settings._POSE_CALIB_MIN_SPEED and self.pose.low_std and (not op_engaged or not self.driver_distracted):
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self.pose.pitch_offseter.push_and_update(self.pose.pitch)
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self.pose.yaw_offseter.push_and_update(self.pose.yaw)
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self.pose_calibrated = self.pose.pitch_offseter.filtered_stat.n > self.settings._POSE_OFFSET_MIN_COUNT and \
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self.pose.yaw_offseter.filtered_stat.n > self.settings._POSE_OFFSET_MIN_COUNT
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self.is_model_uncertain = self.hi_stds > self.settings._HI_STD_FALLBACK_TIME
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self._set_timers(self.face_detected and not self.is_model_uncertain)
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if self.face_detected and not self.pose.low_std and not self.driver_distracted:
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self.hi_stds += 1
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elif self.face_detected and self.pose.low_std:
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self.hi_stds = 0
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def update(self, events, driver_engaged, ctrl_active, standstill):
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if (driver_engaged and self.awareness > 0) or not ctrl_active:
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# reset only when on disengagement if red reached
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self.awareness = 1.
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self.awareness_active = 1.
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self.awareness_passive = 1.
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return
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driver_attentive = self.driver_distraction_filter.x < 0.37
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awareness_prev = self.awareness
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if (driver_attentive and self.face_detected and self.pose.low_std and self.awareness > 0):
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# only restore awareness when paying attention and alert is not red
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self.awareness = min(self.awareness + ((self.settings._RECOVERY_FACTOR_MAX-self.settings._RECOVERY_FACTOR_MIN)*(1.-self.awareness)+self.settings._RECOVERY_FACTOR_MIN)*self.step_change, 1.)
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if self.awareness == 1.:
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self.awareness_passive = min(self.awareness_passive + self.step_change, 1.)
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# don't display alert banner when awareness is recovering and has cleared orange
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if self.awareness > self.threshold_prompt:
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return
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standstill_exemption = standstill and self.awareness - self.step_change <= self.threshold_prompt
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certainly_distracted = self.driver_distraction_filter.x > 0.63 and self.driver_distracted and self.face_detected
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maybe_distracted = self.hi_stds > self.settings._HI_STD_FALLBACK_TIME or not self.face_detected
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if certainly_distracted or maybe_distracted:
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# should always be counting if distracted unless at standstill and reaching orange
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if not standstill_exemption:
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self.awareness = max(self.awareness - self.step_change, -0.1)
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alert = None
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if self.awareness <= 0.:
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# terminal red alert: disengagement required
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alert = EventName.driverDistracted if self.active_monitoring_mode else EventName.driverUnresponsive
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self.terminal_time += 1
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if awareness_prev > 0.:
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self.terminal_alert_cnt += 1
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elif self.awareness <= self.threshold_prompt:
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# prompt orange alert
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alert = EventName.promptDriverDistracted if self.active_monitoring_mode else EventName.promptDriverUnresponsive
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elif self.awareness <= self.threshold_pre:
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# pre green alert
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alert = EventName.preDriverDistracted if self.active_monitoring_mode else EventName.preDriverUnresponsive
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if alert is not None:
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events.add(alert)
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