我现在正在做一个大学项目,用圆周率上的相机计算物体。当检测到一个物体时,我需要每次检测到一个物体时将100计数减少1。我使用开放式简历,但我不需要相机饲料。当一个对象被拾取时,我需要将qtty_of_count
的值减少1,然后这个值被发送到firebase数据库。qtty_of_count - 1
的位置不正确吗?请帮忙。你知道吗
import datetime
import math
import cv2
import numpy as np
import firebase
##from firebase import firebase
# global variables
from firebase.firebase import FirebaseApplication
width = 0
height = 0
EntranceCounter = 0
ExitCounter = 0
min_area = 3000 # Adjust ths value according to your usage
_threshold = 70 # Adjust ths value according to your usage
OffsetRefLines = 150 # Adjust ths value according to your usage
# Check if an object in entering in monitored zone
def check_entrance_line_crossing(y, coor_y_entrance, coor_y_exit):
abs_distance = abs(y - coor_y_entrance)
if ((abs_distance <= 2) and (y < coor_y_exit)):
return 1
else:
return 0
# Check if an object in exitting from monitored zone
def check_exit_line_crossing(y, coor_y_entrance, coor_y_exit):
abs_distance = abs(y - coor_y_exit)
if ((abs_distance <= 2) and (y > coor_y_entrance)):
return 1
else:
return 0
camera = cv2.VideoCapture(0)
# force 640x480 webcam resolution
camera.set(3, 640)
camera.set(4, 480)
ReferenceFrame = None
# Frames may discard while adjusting to light
for i in range(0, 20):
(grabbed, Frame) = camera.read()
while True:
(grabbed, Frame) = camera.read()
height = np.size(Frame, 0)
width = np.size(Frame, 1)
# if cannot grab a frame, this program ends here.
if not grabbed:
break
# gray-scale and Gaussian blur filter applying
GrayFrame = cv2.cvtColor(Frame, cv2.COLOR_BGR2GRAY)
GrayFrame = cv2.GaussianBlur(GrayFrame, (21, 21), 0)
if ReferenceFrame is None:
ReferenceFrame = GrayFrame
continue
# Background subtraction and image manipulation
FrameDelta = cv2.absdiff(ReferenceFrame, GrayFrame)
FrameThresh = cv2.threshold(FrameDelta, _threshold, 255, cv2.THRESH_BINARY)[1]
# Dilate image and find all the contours
FrameThresh = cv2.dilate(FrameThresh, None, iterations=2)
cnts, _ = cv2.findContours(FrameThresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
qtty_of_count =100
# plot reference lines (entrance and exit lines)
coor_y_entrance = (height // 2) - OffsetRefLines
coor_y_exit = (height // 2) + OffsetRefLines
cv2.line(Frame, (0, coor_y_entrance), (width, coor_y_entrance), (255, 0, 0), 2)
cv2.line(Frame, (0, coor_y_exit), (width, coor_y_exit), (0, 0, 255), 2)
# check all found count
for c in cnts:
# if a contour has small area, it'll be ignored
if cv2.contourArea(c) < min_area:
continue
qtty_of_count = qtty_of_count - 1
app = FirebaseApplication('https://appproject-d5d51.firebaseio.com/', None)
update = app.put('/car', "spaces", qtty_of_count)
print("Updated value in FB value: " + str(update))
(x, y, w, h) = cv2.boundingRect(c)
cv2.rectangle(Frame, (x, y), (x + w, y + h), (0, 255, 0), 2)
# find object's centroid
coor_x_centroid = (x + x + w) // 2
coor_y_centroid = (y + y + h) // 2
ObjectCentroid = (coor_x_centroid, coor_y_centroid)
cv2.circle(Frame, ObjectCentroid, 1, (0, 0, 0), 5)
if (check_entrance_line_crossing(coor_y_centroid, coor_y_entrance, coor_y_exit)):
EntranceCounter += 1
if (check_exit_line_crossing(coor_y_centroid, coor_y_entrance, coor_y_exit)):
ExitCounter += 1
print("Total countours found: " + str(qtty_of_count))
# Write entrance and exit counter values on frame and shows it
cv2.putText(Frame, "Entrances: {}".format(str(EntranceCounter)), (10, 50),
cv2.FONT_HERSHEY_SIMPLEX, 0.5, (250, 0, 1), 2)
cv2.putText(Frame, "Exits: {}".format(str(ExitCounter)), (10, 70),
cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 255), 2)
cv2.imshow("Original Frame", Frame)
cv2.waitKey(1)
# cleanup the camera and close any open windows
camera.release()
cv2.destroyAllWindows()
我需要qtty_of_count
在每次检测到对象时减少1。非常感谢。你知道吗
除了@Kevin指出的问题之外,您的代码还在对您捕获的每一帧图像执行求值。如果你的物体在那里停留100帧,你的计数将变为零。你知道吗
要克服这一点,您应该标记图像中的每个对象,然后只计算新对象。这可以通过几种方法来实现(见kalman滤波跟踪),但是在没有发生情况的情况下,一个简单的解决方案可能是存储对象的x,y位置,并建立一个最大位置偏差来保持标签与该对象的距离。你知道吗
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