我正在制作一个程序，其中已使用tkinter制作了GUI，该程序在屏幕上水平显示4个垂直框。现在程序要做的是，如果用户凝视一个盒子大约5秒钟，那么该盒子的颜色只会改变！
但是，我面临的主要问题是代码无法正确检测到我的凝视。当我左右移动眼睛时，它的确显示了一些值，但是大多数情况下在两个角上都显示了相同的值。同时，这些值也波动很大。我仍然无法正确校准视线。我已附上以下代码：
import cv2
import numpy as np
import dlib
from math import hypot
from tkinter import *
cap = cv2.VideoCapture(0)
detector = dlib.get_frontal_face_detector()
predictor = dlib.shape_predictor("shape_predictor_68_face_landmarks.dat")
def midpoint(p1 ,p2):
return int((p1.x + p2.x)/2), int((p1.y + p2.y)/2)
font = cv2.FONT_HERSHEY_PLAIN
def get_blinking_ratio(eye_points, facial_landmarks):
left_point = (facial_landmarks.part(eye_points[0]).x, facial_landmarks.part(eye_points[0]).y)
right_point = (facial_landmarks.part(eye_points[3]).x, facial_landmarks.part(eye_points[3]).y)
center_top = midpoint(facial_landmarks.part(eye_points[1]), facial_landmarks.part(eye_points[2]))
center_bottom = midpoint(facial_landmarks.part(eye_points[5]), facial_landmarks.part(eye_points[4]))
#hor_line = cv2.line(frame, left_point, right_point, (0, 255, 0), 2)
#ver_line = cv2.line(frame, center_top, center_bottom, (0, 255, 0), 2)
hor_line_lenght = hypot((left_point[0] - right_point[0]), (left_point[1] - right_point[1]))
ver_line_lenght = hypot((center_top[0] - center_bottom[0]), (center_top[1] - center_bottom[1]))
ratio = hor_line_lenght / ver_line_lenght
return ratio
def get_gaze_ratio(eye_points, facial_landmarks):
left_eye_region = np.array([(facial_landmarks.part(eye_points[0]).x, facial_landmarks.part(eye_points[0]).y),
(facial_landmarks.part(eye_points[1]).x, facial_landmarks.part(eye_points[1]).y),
(facial_landmarks.part(eye_points[2]).x, facial_landmarks.part(eye_points[2]).y),
(facial_landmarks.part(eye_points[3]).x, facial_landmarks.part(eye_points[3]).y),
(facial_landmarks.part(eye_points[4]).x, facial_landmarks.part(eye_points[4]).y),
(facial_landmarks.part(eye_points[5]).x, facial_landmarks.part(eye_points[5]).y)], np.int32)
# cv2.polylines(frame, [left_eye_region], True, (0, 0, 255), 2)
height, width, _ = frame.shape
mask = np.zeros((height, width), np.uint8)
cv2.polylines(mask, [left_eye_region], True, 255, 2)
cv2.fillPoly(mask, [left_eye_region], 255)
eye = cv2.bitwise_and(gray, gray, mask=mask)
min_x = np.min(left_eye_region[:, 0])
max_x = np.max(left_eye_region[:, 0])
min_y = np.min(left_eye_region[:, 1])
max_y = np.max(left_eye_region[:, 1])
gray_eye = eye[min_y: max_y, min_x: max_x]
_, threshold_eye = cv2.threshold(gray_eye, 70, 255, cv2.THRESH_BINARY)
height, width = threshold_eye.shape
left_side_threshold = threshold_eye[0: height, 0: int(width / 2)]
left_side_white = cv2.countNonZero(left_side_threshold)
right_side_threshold = threshold_eye[0: height, int(width / 2): width]
right_side_white = cv2.countNonZero(right_side_threshold)
if left_side_white == 0:
gaze_ratio = 1
elif right_side_white == 0:
gaze_ratio = 5
else:
gaze_ratio = left_side_white / right_side_white
return gaze_ratio
root = Tk()
lf = Frame(root)
lf.pack()
rf = Frame(root)
rf.pack()
Canvas = Canvas(root, width = 1300, height=650)
Canvas.pack()
while True:
_, frame = cap.read()
new_frame = np.zeros((500, 500, 3), np.uint8)
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
faces = detector(gray)
for face in faces:
#x, y = face.left(), face.top()
#x1, y1 = face.right(), face.bottom()
#cv2.rectangle(frame, (x, y), (x1, y1), (0, 255, 0), 2)
landmarks = predictor(gray, face)
"""
# Detect blinking
left_eye_ratio = get_blinking_ratio([36, 37, 38, 39, 40, 41], landmarks)
right_eye_ratio = get_blinking_ratio([42, 43, 44, 45, 46, 47], landmarks)
blinking_ratio = (left_eye_ratio + right_eye_ratio) / 2
if blinking_ratio > 5.7:
cv2.putText(frame, "BLINKING", (50, 150), font, 7, (255, 0, 0))
"""
# Gaze detection
gaze_ratio_left_eye = get_gaze_ratio([36, 37, 38, 39, 40, 41], landmarks)
gaze_ratio_right_eye = get_gaze_ratio([42, 43, 44, 45, 46, 47], landmarks)
gaze_ratio = (gaze_ratio_right_eye + gaze_ratio_left_eye) / 2
cv2.putText(frame, str(gaze_ratio), (50, 200), font, 2, (0, 0, 255), 3)
Canvas.create_rectangle(0,0,325,600,fill = "Lightgrey")
Canvas.create_rectangle(325,0,650,600,fill = "Lightgrey")
Canvas.create_rectangle(650,0,975,600,fill = "Lightgrey")
Canvas.create_rectangle(975,0,1300,600,fill = "Lightgrey")
Canvas.create_text(165,300,text = "Drinking", font = "Times 25 bold")
Canvas.create_text(490,300,text = "Food", font = "Times 25 bold")
Canvas.create_text(805,300,text = "Sleep", font = "Times 25 bold")
Canvas.create_text(1140,300,text = "Washroom", font = "Times 25 bold")
def Drinking():
Canvas.create_rectangle(0,0,325,600,fill = "yellow")
Canvas.create_text(165,300,text = "Drinking", font = "Times 25 bold")
def Food():
Canvas.create_rectangle(325,0,650,600,fill = "yellow")
Canvas.create_text(490,300,text = "Food", font = "Times 25 bold")
def Sleep():
Canvas.create_rectangle(650,0,975,600,fill = "yellow")
Canvas.create_text(805,300,text = "Sleep", font = "Times 25 bold")
def Washroom():
Canvas.create_rectangle(975,0,1300,600,fill = "yellow")
Canvas.create_text(1140,300,text = "Washroom", font = "Times 25 bold")
Button(root, text = "change color", command=Drinking).pack(side = LEFT)
Button(root, text = "change color", command=Food).pack(side = LEFT)
Button(root, text = "change color", command=Washroom).pack(side = RIGHT)
Button(root, text = "change color", command=Sleep).pack(side = RIGHT)
lf.pack(side = LEFT)
rf.pack(side = RIGHT)
root.mainloop()
if gaze_ratio <= 0.4:
cv2.putText(frame, "Washroom", (50, 100), font, 2, (0, 0, 255), 3)
new_frame[:] = (0, 0, 255)
#Canvas.pack()
#Drinking()
elif 0.45 <= gaze_ratio <= 0.8:
cv2.putText(frame, "Sleep", (50, 100), font, 2, (0, 0, 255), 3)
#Food()
elif 0.8 <= gaze_ratio <= 0.9:
cv2.putText(frame, "Food", (50, 100), font, 2, (0, 0, 255), 3)
#Sleep()
elif 0.9 <= gaze_ratio <= 1.3:
cv2.putText(frame, "Drinking", (50, 100), font, 2, (0, 0, 255), 3)
#Washroom()
cv2.imshow("Frame", frame)
#cv2.imshow("New frame", new_frame)
key = cv2.waitKey(1)
if key == 27:
break
cap.release()
cv2.destroyAllWindows()