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Tracker.py
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Tracker.py
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#object that uses camshift and/or viola jones to track face
import cv2 as cv
import faceGestureRecognitionV2
from CamShiftObject import CamShiftObject
import threading
class FaceTracking:
face = None
leftabove = None
rightunder = None
cap = None
# these are needed to find the angle under which the box is rotated
headangle = None
lefteyeangle = None
righteyeangle = None
# these are used to indicate f camshift is required, if the eye has been detected by viola_jones, then camshift is
# unnecessary
foundhead = False
foundeyes = False
cam_head = None
cam_lefteye = None
cam_righteye = None
#for showing the squares
rethead = None
retlefteye = None
retrighteye = None
check_timer = False
def __init__(self, i_cap):
self.cap = i_cap
while self.face is None:
ret, frame = i_cap.read()
faces = faceGestureRecognitionV2.getFaces(frame)
cv.imshow('looking for face', frame)
if len(faces) > 0:
face = faces[0]
cv.rectangle(frame, (face.startX, face.startY), (face.startX + face.width, face.startY + face.height),
(255, 0, 0), 2)
if face.leftEyeY:
cv.rectangle(frame,(face.leftEyeX,face.leftEyeY),
(face.leftEyeX+face.eyeWidth,face.leftEyeY+face.eyeHeight),
(255,0,0),2)
cv.imshow('looking for face', frame)
if face.leftEyeX is not None and face.startX is not None:
self.face = face
self.headangle = 0
self.rethead = ((face.startX + face.width/2, face.startY + face.height/2), (face.width, face.height), 0)
self.cam_head = CamShiftObject(frame, face.startX, face.startY, face.width, face.height)
self.lefteyeangle = 0
self.cam_lefteye = CamShiftObject(frame, face.leftEyeX, face.leftEyeY, face.eyeWidth, face.eyeHeight)
self.retlefteye = ((face.leftEyeX + face.eyeWidth / 2, face.leftEyeY + face.eyeHeight / 2),
(face.eyeWidth, face.eyeHeight), 0)
self.righteyeangle = 0
self.retrighteye = ((face.rightEyeX + face.eyeWidth / 2, face.rightEyeY + face.eyeHeight / 2),
(face.eyeWidth, face.eyeHeight), 0)
self.cam_righteye = CamShiftObject(frame, face.rightEyeX, face.rightEyeY, face.eyeWidth, face.eyeHeight)
self.timer()
cv.destroyAllWindows()
cv.waitKey(1)
def check_viola_jones(self, frame):
foundFaces = faceGestureRecognitionV2.getFaces(frame)
self.foundeyes = False
self.foundhead = False
if len(foundFaces) != 0:
face = foundFaces[0]
if face.startX is not None:
# self.foundhead = True
self.face.setHead(face.startX, face.startY, face.width, face.height)
self.rethead = (
(face.startX + face.width / 2, face.startY + face.height / 2), (face.width, face.height), 0)
self.cam_head.roi_setup(frame, face.startX, face.startY, face.width, face.height)
if face.leftEyeX is not None and face.startX is not None:
self.face.setEyes(face.leftEyeX, face.leftEyeY, face.rightEyeX, face.rightEyeY, face.eyeWidth, face.eyeHeight)
# self.foundeyes = True
self.retlefteye = ((face.leftEyeX + face.eyeWidth / 2, face.leftEyeY + face.eyeHeight / 2),
(face.eyeWidth, face.eyeHeight), 0)
self.cam_lefteye.roi_setup(frame, face.leftEyeX, face.leftEyeY, face.eyeWidth, face.eyeHeight)
self.retrighteye = ((face.rightEyeX + face.eyeWidth / 2, face.rightEyeY + face.eyeHeight / 2),
(face.eyeWidth, face.eyeHeight), 0)
def MeanShiftTracking(self, cam_tracker, frame):
track_window = cam_tracker.track_window
# set up the ROI for tracking
roi_hist = cam_tracker.roi_hist
term_crit = cam_tracker.term_crit
hsv = cv.cvtColor(frame, cv.COLOR_BGR2HSV)
dst = cv.calcBackProject([hsv], [0], roi_hist, [0, 180], 1)
# apply meanshift to get the new location
ret, track_window = cv.meanShift(dst, track_window, term_crit)
return ret, track_window
# def InitOpenCVTracking(self, CV_tracker, frame):
def CamshiftTracking(self, cam_tracker, frame):
track_window = cam_tracker.track_window
# set up the ROI for tracking
roi_hist = cam_tracker.roi_hist
term_crit = cam_tracker.term_crit
hsv = cv.cvtColor(frame, cv.COLOR_BGR2HSV)
dst = cv.calcBackProject([hsv],[0],roi_hist,[0,180],1)
# apply meanshift to get the new location
ret, track_window = cv.CamShift(dst, track_window, term_crit)
return ret, track_window
# def OpenCV_Tracking(self, cam_tracker, frame):
def GetEyes(self):
eye1 = self.cam_lefteye.roi
eye2 = self.cam_righteye.roi
return eye1, eye2
def timer(self):
self.check_timer = True
threading.Timer(1, self.timer).start()
def PerformFaceTracking(self):
ret, frame = self.cap.read()
if self.check_timer:
self.check_viola_jones(frame)
self.check_timer = False
# self.foundeyes = False
# self.foundhead = False
else:
# https://docs.opencv.org/3.4/db/df8/tutorial_py_meanshift.html
if not self.foundhead:
ret, track_window = self.MeanShiftTracking(self.cam_head, frame)
# self.headangle = ret[2]
# self.rethead = ret
self.face.setHead(track_window[0], track_window[1], track_window[2], track_window[3])
if not self.foundeyes:
ret, track_window_left = self.MeanShiftTracking(self.cam_lefteye, frame)
# self.lefteyeangle = ret[2]
# self.retlefteye = ret
ret, track_window_right = self.MeanShiftTracking(self.cam_righteye, frame)
# self.righteyeangle = ret[2]
# self.retrighteye = ret
self.face.setEyes(track_window_left[0], track_window_left[1], track_window_right[0], track_window_right[1],
track_window_right[2],
track_window_right[3])