def greenElaboration(filepath, showVideo=False):
'''
Script adapted from the arrota project from the webcam to the video use
It uses the a green channel mode to calculate the bpm series
This is a variant of the classic mode in which the series is given as a circolar list of means and each seconds.
'''
#variables
bpms = list(
) # a series with the second in question and the bpm calculated for that second
means = list()
firstTime = True
secondsBeforeNewLine = 20 # cosmetic variable to set after how many second-points it should have a new line
fps = 0 # in a video, the fps is known
videoLen = 0 # The number of frames in the video
secondsInTheList = 30 # The seconds window to keep
cap = cv2.VideoCapture(filepath)
if (cap.isOpened() == False):
print("Unable to read the video")
# Find OpenCV version
(major_ver, minor_ver, subminor_ver) = (cv2.__version__).split('.')
#Taking the fps of the video and the number of frames of it
if int(major_ver) < 3:
fps = cap.get(cv2.cv.CV_CAP_PROP_FPS)
videoLen = int(cap.get(cv2.cv.CV_CAP_PROP_FRAME_COUNT))
else:
fps = cap.get(cv2.CAP_PROP_FPS)
videoLen = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
# finding the face cascade
face_cascade = cv2.CascadeClassifier(
os.path.join(sourcePath, 'haarcascade_frontalface_default.xml'))
print("processing the video with the circular green mode...")
print("the fps of the video is: " + str(fps) + " , " +
"and the number of frames is: " + str(videoLen))
print("please wait while it is calculating:")
for currentFrame in range(0, videoLen):
ret, frame = cap.read()
#print(frame)
try:
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
#Face detection
faces = face_cascade.detectMultiScale(gray, 1.3, 5)
# reads a new frame only if there is 1 face
if len(faces) == 1:
for (x, y, w, h) in faces:
reducedWidth = int(w * 0.63)
modifiedX = int(w * 0.15)
reduceHeigh = int(h * 0.25)
inizioY = int(h * 0.1)
fronteX = int(w - reducedWidth)
# done for each frame because it is
foreheadX = x + fronteX
foreheadY = y + inizioY
foreheadX2 = x + reducedWidth
foreheadY2 = y + reduceHeigh
#forehead detection
fronte = frame[foreheadY:foreheadY2, foreheadX:foreheadX2]
face = frame[y:y + h, x + modifiedX:x + w - modifiedX]
means.append(np.mean(fronte[:, :, 1]))
else: #TO CHANGE?: se non c'è una faccia come media mette la media precedente
if len(means) > 0:
means.append(means[len(means) - 1])
#calculates not for each frame but for each second more or less
if (currentFrame > 0 and currentFrame % fps == 0):
bpm = bpm_elaboration(means, fps)
bpms.append([currentFrame / fps, bpm])
print('.', end='', flush=True) # 1 dot displayed for second
if (
int(currentFrame / fps) % secondsBeforeNewLine == 0
): # 1 new line displayed for each secondsBeforeNewLine seconds
print()
#deleting the first second when it has secondsInTheList secs
if (len(means) >= secondsInTheList * fps):
del means[0:int(fps)]
# show the skin in video
if (showVideo):
cv2.rectangle(
frame, (foreheadX, foreheadY), (foreheadX2, foreheadY2),
(0, 255, 0),
2) # the rectangle that will show on the forehead
if (showVideo): #show the video
cv2.imshow('Video', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
except Exception as e:
print("[exception GreenElaboration] At frame: " +
str(currentFrame) + " of " + str(videoLen) +
" there is no frame. Terminating...")
#print("[exception GreenElaboration] cap.opened: "+str(cap.isOpened()))
break #just for now
#bpm = bpm_elaboration(means, fps)
print() # putting the next print after a new line having a clean text
# clear up the capture
cap.release()
return bpms
def dynGreenElaboration(filepath, showVideo=False):
'''
Script adapted from the arrota project from the webcam to the video use
It uses the ica mode to calculate the bpm series
'''
#variables
bpms = list(
) # a series with the second in question and the bpm calculated for that second
means = list()
firstTime = True
secondOfFrame = 10 # the window of seconds on which clear the means saved. 10 seconds for default
# 1 means that every second after the calculation it will clear the means lists
secondsBeforeNewLine = 20 # cosmetic variable to set after how many second-points it should have a new line
fps = 0 # in a video, the fps is known
videoLen = 0 # the number of frames in the video
cap = cv2.VideoCapture(filepath)
if (cap.isOpened() == False):
print("Unable to read the video")
# Find OpenCV version
(major_ver, minor_ver, subminor_ver) = (cv2.__version__).split('.')
#Taking the fps of the video and the number of frames of it
if int(major_ver) < 3:
fps = cap.get(cv2.cv.CV_CAP_PROP_FPS)
videoLen = int(cap.get(cv2.cv.CV_CAP_PROP_FRAME_COUNT))
else:
fps = cap.get(cv2.CAP_PROP_FPS)
videoLen = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
face_cascade = cv2.CascadeClassifier(
os.path.join(sourcePath, 'haarcascade_frontalface_default.xml'))
print(
"[info dynGreenElaboration] Processing the video with the dynamic green mode..."
)
#print("[info dynGreenElaboration]the fps of the video is: "+str(fps)+" , "+ "and the number of frames is: "+str(videoLen) )
#print("[info dynGreenElaboration]please wait while it is calculating:")
for currentFrame in range(0, videoLen):
ret, frame = cap.read()
#print(frame)
try:
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
#Face detection
faces = face_cascade.detectMultiScale(gray, 1.3, 5)
if len(faces) == 1:
for (x, y, w, h) in faces:
reducedWidth = int(w * 0.63)
modifiedX = int(w * 0.15)
reduceHeigh = int(h * 0.25)
inizioY = int(h * 0.1)
fronteX = int(w - reducedWidth)
fronteY = int(h - reduceHeigh)
face = frame[y:y + h, x + modifiedX:x + w - modifiedX]
if firstTime:
foreheadX = x + fronteX
foreheadY = y + inizioY
foreheadX2 = x + reducedWidth
foreheadY2 = y + reduceHeigh
firstTime = False
fronte = frame[foreheadY:foreheadY2, foreheadX:foreheadX2]
#forehead detection
green = fronte[:, :, 1]
fronte = np.zeros((green.shape[0], green.shape[1], 3),
dtype=green.dtype)
fronte[:, :, 1] = green
means.append(np.mean(fronte[:, :, 1]))
else: # se non c'è una faccia come media mette la media precedente
if len(means) > 0:
means.append(means[len(means) - 1])
#calculates not for each frame but for each second more or less
if (currentFrame > 0 and currentFrame % fps == 0):
if (int(currentFrame / fps) % secondOfFrame == 0):
bpm = bpm_elaboration(means, fps)
bpms.append([currentFrame / fps, bpm])
means = []
print('.', end='', flush=True) # 1 point displayed for second
if (int(currentFrame / fps) % secondsBeforeNewLine == 0):
print()
# show the skin in video
if (showVideo):
cv2.rectangle(
frame, (foreheadX, foreheadY), (foreheadX2, foreheadY2),
(0, 255, 0),
2) # the rectangle that will show on the forehead
if (showVideo): #show the video
cv2.imshow('Video', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
except Exception as e:
print("[exception dynGreenElaboration] At frame: " +
str(currentFrame) + " of " + str(videoLen) +
" there is no frame. Terminating...")
#print("[exception dynGreenElaboration] cap.opened: "+str(cap.isOpened()))
break #just for now
#bpm = bpm_elaboration(means, fps)
print() # putting the next print after a new line having a clean text
# clear up the capture
cap.release()
return bpms
def greenElaboration(self):
'''
Script adapted from the arrota project. It uses the ica mode to calculate the bpm series.
In this case, this all happens each frame instead of the usual loop while inside this method
'''
self.frame = self.vs.read()
if time.clock(
) > 3: # skip the first seconds to setup the focus of the camera
#Face detection
gray = cv2.cvtColor(self.frame, cv2.COLOR_BGR2GRAY)
faces = self.face_cascade.detectMultiScale(gray, 1.3, 5)
if len(faces) == 1: #The detection is of just 1 face
if self.debug == True:
cv2.putText(self.frame, "Please, don't move",
(self.leftOffset, self.lowHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, self.tsize - 2,
self.redCol, 1, cv2.LINE_AA) # just a warning
for (x, y, w, h) in faces:
#Skin detection of the foreground
reducedWidth = int(w * 0.63)
modifiedX = int(w * 0.15)
reduceHeigh = int(h * 0.25)
inizioY = int(h * 0.1)
frontX = int(w - reducedWidth)
# Picking the coordinates of the forehead
self.foreheadY = y + inizioY
self.foreheadX = x + frontX
self.foreheadX2 = x + reducedWidth
self.foreheadY2 = y + reduceHeigh
# initial time and start the savings
if self.firstTime:
self.firstTime = False
self.t0 = time.clock()
self.vs.startSaving()
# Note: put it down when it determines the foreground to pass
#cv2.rectangle(frame, (foreheadX, foreheadY), (foreheadX2, foreheadY2), greenCol, 2) # the rectangle that will shown on the forehead
else:
if len(faces) == 0:
#print("[info] Green WebcamThreadCirc: no face detected")
if self.debug == True:
cv2.putText(self.frame, "No face detected...",
(self.leftOffset, self.lowHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, 1, self.redCol)
else:
#print("[info] Green WebcamThreadCirc: too many facec detected")
if self.debug == True:
cv2.putText(self.frame, "Too many faces...",
(self.leftOffset, self.lowHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, 1, self.redCol)
if len(self.times) > 9 and len(
self.means
) > 0: # wait some frames before to start the calculations of the bpm
# The CALCULATION
# calculates for each second more or less, because the user won't understand the difference between time+0.5 or time +1 seconds
if time.clock() - self.timeBetweenCalculations >= 1:
self.timeBetweenCalculations = time.clock()
# determines the means for the new frames
if (not self.vs.isNotSaving):
# TO DO: circular means/greens
if (len(self.bpms) >= self.secondsInTheList):
del self.bpms[0]
del self.means[0:int(self.fps)]
del self.times[0:int(self.fps)]
self.means, self.times = self.determineMeans(
self.vs, self.means, self.times, self.foreheadX,
self.foreheadY, self.foreheadX2, self.foreheadY2)
if self.debug == True:
cv2.rectangle(
self.frame, (self.foreheadX, self.foreheadY),
(self.foreheadX2, self.foreheadY2),
self.greenCol, 2
) # the rectangle that will be shown on the forehead
#print("After determine red : "+str(len(red_means))+ "and times: "+str(len(times)))
if not len(self.times) == len(
self.means
): # when the two lenghts are different, for some reasons
print(
"[info check len(times) != len(red_means)] different len: "
+ str(len(self.times)) + " , " +
str(len(self.means)))
self.means = adjustList(self.means, self.times)
self.fps = fps_elaboration(self.times)
self.bpm = bpm_elaboration(self.means, self.fps,
self.times)
self.bpms.append([time.clock() - self.t0, int(self.bpm)])
# this works for when there is a time window to investigate. 30 is for 30 seconds
if (self.fps * 30 > 250):
max_samples = int(self.fps) * 30
else:
#TO DO: 35 is static. we should need a proportion time
self.fremaining = int(
35 + self.t0 - time.clock()
) #probably to change with a dynamic remaining
#print("time passed after the last check: "+ str(timeBetweenCalculations))
if (
self.bpm > 0
): # In this way we won't show non positive bpm (the start or wrong calculations)
if self.debug == True:
cv2.putText(self.frame, "bpm: " + str(int(self.bpm)),
(self.foreheadX - 25, self.foreheadY - 45),
cv2.FONT_HERSHEY_SIMPLEX, self.tsize - 2,
self.redCol) # display the bpm
else:
if self.debug == True:
cv2.putText(self.frame, "Starting...",
(self.leftOffset, self.highHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, 1,
self.redCol) # second message
cv2.putText(self.frame, "Please, don't move",
(self.leftOffset, self.lowHeightOffset + 40),
cv2.FONT_HERSHEY_SIMPLEX, self.tsize - 2,
self.redCol, 1, cv2.LINE_AA) # just a warning
if time.clock(
) - self.timeBetweenCalculations >= 1: # i'm trying to calculate not for each frame but for each second more or less, to increase the fps
self.timeBetweenCalculations = time.clock()
# determines the means for the new frames
if (not self.vs.isNotSaving):
self.means, self.times = self.determineMeans(
self.vs, self.means, self.times, self.foreheadX,
self.foreheadY, self.foreheadX2, self.foreheadY2)
if self.debug == True:
cv2.rectangle(
self.frame, (self.foreheadX, self.foreheadY),
(self.foreheadX2, self.foreheadY2),
self.greenCol, 2
) # the rectangle that will be shown on the forehead
if self.debug == True:
cv2.imshow('Webcam', self.frame)
else:
if self.debug == True:
cv2.putText(self.frame, "Loading...",
(self.leftOffset, self.highHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, self.tsize - 2,
self.redCol) # first message
cv2.putText(self.frame, "Please, take off your glasses",
(self.leftOffset, self.lowHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, self.tsize - 2,
self.redCol, 1, cv2.LINE_AA) # just a warning
#cv2.imshow('Webcam', frame)
'''
if time.clock() >= 180: # this is ok only if the time of invastigation is under the 180 seconds
print("[Debug time clock>180] over the time break")
self.vs.stop()
cv2.destroyAllWindows()
return -3
'''
if self.debug == True:
cv2.imshow('Webcam', self.frame)
if cv2.waitKey(1) & 0xFF == ord(
'q'): # Press Q on keyboard to stop reproducing the camera
print("return in green webcamThread")
self.stop()
return
#last calculation after the loop
#print("last before rppg. red : "+str(len(red_means))+ " and times: "+str(len(times)))
'''
def greenElaboration(camSource=0):
'''
Script adapted from the arrota project. It uses the ica mode to calculate the bpm series.
The input is the camera source number (0 is the default one)
'''
# calling the thread responsible for the webcam readings
vs = web.WebcamStreamForHRV(
src=camSource).start() #to change when this becomes a function
face_cascade = cv2.CascadeClassifier(
os.path.join(sourcePath, 'haarcascade_frontalface_default.xml'))
#variables
frame_width = vs.getWidth()
frame_height = vs.getHeight()
redCol = (0, 0, 255) # red color in BGR
greenCol = (0, 255, 0) # green color in BGR
tsize = 3 #Dimension of the time elements
max_samples = 300 # number of frames to collect before end
remaining = -1 # const to say when it is the end
t0 = 0
bpm = 0
times = list()
bpms = list(
) # a series with the second in question and the bpm calculated for that second
means = list()
firstTime = True
secondsBeforeNewLine = 20 # cosmetic variable to set after how many second-points it should have a new line
red_means = list()
means = list()
blue_means = list()
# variables to not calculate everytime
leftOffset = int(frame_width /
21) # around 30 in offeset with 640 as frame width
highHeightOffset = int(frame_height * 3 /
24) # 60 in offeset with 480 as frame height
lowHeightOffset = int(frame_height * 21 /
24) # 420 in offeset with 480 as frame height
heightOffsetSeconds = int(frame_height * 5 /
24) # 100 in offeset with 480 as frame height
timeBetweenCalculations = 0 #a variable to wait before recalculate the bpm
print("starting the green webcam mode...")
print("please wait while it is calculating:")
# first loop: it takes the frames, saves the means and works on them
while (True):
frame = vs.read()
if time.clock(
) > 3: # skip the first seconds to setup the focus of the camera
if 0 <= max_samples - len(means) and remaining != -1:
cv2.putText(frame, str(remaining),
(leftOffset, heightOffsetSeconds),
cv2.FONT_HERSHEY_SIMPLEX, tsize,
redCol) # the countdown displayed
#Face detection
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
faces = face_cascade.detectMultiScale(gray, 1.3, 5)
if len(faces) == 1: #The detection is of just 1 face
cv2.putText(frame, "Please, don't move",
(leftOffset, lowHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, tsize - 2, redCol, 1,
cv2.LINE_AA) # just a warning
for (x, y, w, h) in faces:
#Skin detection of the foreground
reducedWidth = int(w * 0.63)
modifiedX = int(w * 0.15)
reduceHeigh = int(h * 0.25)
inizioY = int(h * 0.1)
frontX = int(w - reducedWidth)
# Picking the coordinates of the forehead
foreheadY = y + inizioY
foreheadX = x + frontX
foreheadX2 = x + reducedWidth
foreheadY2 = y + reduceHeigh
# initial time and start the savings
if firstTime:
firstTime = False
t0 = time.clock()
vs.startSaving()
# Note: put it down when it determines the foreground to pass
#cv2.rectangle(frame, (foreheadX, foreheadY), (foreheadX2, foreheadY2), greenCol, 2) # the rectangle that will shown on the forehead
else:
if len(faces) == 0:
cv2.putText(frame, "No face detected...",
(leftOffset, lowHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, 1, redCol)
else:
cv2.putText(frame, "Too many faces...",
(leftOffset, lowHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, 1, redCol)
if len(times) > 9 and len(
means
) > 0: # wait some frames before to start the calculations of the bpm
# The CALCULATION
# calculates for each second more or less, because the user won't understand the difference between time+0.5 or time +1 seconds
if time.clock() - timeBetweenCalculations >= 1:
timeBetweenCalculations = time.clock()
# determines the means for the new frames
if (not vs.isNotSaving):
means, times = determineMeans(vs, means, times,
foreheadX, foreheadY,
foreheadX2, foreheadY2)
cv2.rectangle(
frame, (foreheadX, foreheadY),
(foreheadX2, foreheadY2), greenCol, 2
) # the rectangle that will be shown on the forehead
#print("After determine red : "+str(len(red_means))+ "and times: "+str(len(times)))
if not len(times) == len(
means
): # when the two lenghts are different, for some reasons
print(
"[info check len(times) != len(red_means)] different len: "
+ str(len(times)) + " , " + str(len(means)))
means = adjustList(means, times)
fps = fps_elaboration(times)
bpm = bpm_elaboration(means, fps, times)
bpms.append([time.clock() - t0, int(bpm)])
# this works for when there is a time window to investigate. 30 is for 30 seconds
if (fps * 30 > 250):
max_samples = int(fps) * 30
else:
#TO DO: 35 is static. we should need a proportion time
remaining = int(
35 + t0 - time.clock()
) #probably to change with a dynamic remaining
#print("time passed after the last check: "+ str(timeBetweenCalculations))
if (
bpm > 0
): # In this way we won't show non positive bpm (the start or wrong calculations)
cv2.putText(frame, "bpm: " + str(int(bpm)),
(foreheadX - 25, foreheadY - 45),
cv2.FONT_HERSHEY_SIMPLEX, tsize - 2,
redCol) # display the bpm
else:
cv2.putText(frame, "Starting...",
(leftOffset, highHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, 1,
redCol) # second message
cv2.putText(frame, "Please, don't move",
(leftOffset, lowHeightOffset + 40),
cv2.FONT_HERSHEY_SIMPLEX, tsize - 2, redCol, 1,
cv2.LINE_AA) # just a warning
if time.clock(
) - timeBetweenCalculations >= 1: # i'm trying to calculate not for each frame but for each second more or less, to increase the fps
timeBetweenCalculations = time.clock()
# determines the means for the new frames
if (not vs.isNotSaving):
means, times = determineMeans(vs, means, times,
foreheadX, foreheadY,
foreheadX2, foreheadY2)
cv2.rectangle(
frame, (foreheadX, foreheadY),
(foreheadX2, foreheadY2), greenCol, 2
) # the rectangle that will be shown on the forehead
cv2.imshow('Webcam', frame)
else:
cv2.putText(frame, "Loading...", (leftOffset, highHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, tsize - 2,
redCol) # first message
cv2.putText(frame, "Please, take off your glasses",
(leftOffset, lowHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, tsize - 2, redCol, 1,
cv2.LINE_AA) # just a warning
#cv2.imshow('Webcam', frame)
if time.clock(
) >= 180: # this is ok only if the time of invastigation is under the 180 seconds
print("[Debug time clock>180] over the time break")
vs.stop()
cv2.destroyAllWindows()
return -3
if len(times) >= max_samples:
#print("times> max samples. red : "+str(len(red_means))+ "and times: "+str(len(times)))
break
cv2.imshow('Webcam', frame)
if cv2.waitKey(1) & 0xFF == ord(
'q'): # Press Q on keyboard to stop reproducing the camera
break
#last calculation after the loop
#print("last before rppg. red : "+str(len(red_means))+ " and times: "+str(len(times)))
try:
bpm = bpm_elaboration(means, fps, times)
bpms.append([time.clock() - t0, int(bpm)])
except ValueError as e: #the butterworth doesn't work
print(" last bpm.ValueError: {0}".format(e))
vs.stop()
cv2.destroyAllWindows()
return -1
except Exception as e:
print("last calculation. Unknown error: " + (str(e)))
vs.stop()
cv2.destroyAllWindows()
return -2
#print("[info] the calculated bpm is : " + str(bpm))
vs.stopSaving()
# second loop: show the result but it doesn't compute anymore
while (True):
frame = vs.read()
cv2.putText(frame, "Press 'q' to quit", (leftOffset, highHeightOffset),
cv2.FONT_HERSHEY_SIMPLEX, 1, redCol)
cv2.putText(frame, "Final bpm: " + str(int(bpm)),
(leftOffset, heightOffsetSeconds),
cv2.FONT_HERSHEY_SIMPLEX, 1, redCol)
cv2.imshow('Webcam', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
# do a bit of cleanup
vs.stop()
cv2.destroyAllWindows()
return bpms
