PPG_Delattre_Dey/RGB_channels.py

106 lines
2.7 KiB
Python

import cv2
import csv
import os
import os.path
def rep_files_init():
#create a directory to store the RGB datas ouptut
path_to_script = os.path.dirname(os.path.abspath(__file__))
if os.path.exists(path_to_script + r"\RGB database") == False:
os.mkdir(path_to_script + r"\RGB database")
onlyfiles = next(os.walk(path_to_script + r"\frames"))[2] #get the amount of frames previously extracted
frames_num = len(onlyfiles)-1
return frames_num
def RGB_dataframe(img, itr):
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
faces = face_cascade.detectMultiScale(gray, 1.3, 5)
for (x,y,w,h) in faces:
# To draw a rectangle in a face
cv2.rectangle(img,(x,y),(x+w,y+h),(255,255,0),2)
roi_gray = gray[y:y+h, x:x+w]
roi_color = img[y:y+h, x:x+w]
eyes = eye_cascade.detectMultiScale(roi_gray)
list_ex = []
list_ey = []
list_ew = []
list_eh = []
#To draw a rectangle in eyes
for (ex,ey,ew,eh) in eyes:
if ew >= 80 and eh >= 80:
#cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,127,255),2)
list_ex.append(ex)
list_ey.append(ey)
list_ew.append(ew)
list_eh.append(eh)
#rectangle on forhead
fx = min(list_ex) + list_ew[list_ex.index(min(list_ex))]
fy = max(list_ey)
#extra values in x and y in the parameters are adjustements made after manual testing
cv2.rectangle(roi_color, (fx,fy-150),(fx+100,fy-20),(0,127,255),2)
imS = cv2.resize(img, (960, 540))
#cv2.imshow('img',imS)
#cv2.waitKey(0)
x1 = x + fx
x2 = x + fx + 100
y1 = y + fy - 150
y2 = y + fy - 20
imRGB = img[y1:y2, x1:x2]
#cv2.imshow('img',imRGB)
#cv2.waitKey(0)
R = []
G = []
B = []
size_list = list(imRGB.shape[:2])
pixel_values = []
for i in range(0, size_list[0]):
for j in range(0, size_list[1]):
k = imRGB[i,j]
R.append(k[0])
G.append(k[1])
B.append(k[2])
return R, G, B
def average_and_export():
i = 0
count = 0.1
pixel_values = []
frames_num = rep_files_init()
while i < frames_num:
i += 1
image = "frames/frame" + str(i) + ".jpg"
read_img = cv2.imread(image)
#Bug here inside of func with min funcs of empty data
try:
out_colors = RGB_dataframe(read_img, i)
except:
out_colors = out_colors
Ravg = sum(out_colors[0])/len(out_colors[0])
Gavg = sum(out_colors[1])/len(out_colors[1])
Bavg = sum(out_colors[2])/len(out_colors[2])
pixel_values.append([Ravg, Gavg, Bavg])
if i/frames_num >= count:
print(str(round(count*100))+ "% of the database exported to csv")
count += 0.1
with open('RGB database/RGB_data.csv', 'w', newline="") as f:
fields = ['R', 'G', 'B']
write = csv.writer(f)
write.writerow(fields)
write.writerows(pixel_values)
return
average_and_export()