我想找到一个物体的速度。首先,我测量两个球通过那里和他们的差异找到长度。还有时间..最后我将长度分为时间,但速度要快......
我的问题是计算机在视频中很快找到轮廓。当我使用time.sleep()时,滞后开始于视频。我不想这样。我只希望“找到轮廓减速的速度”没有任何fps或滞后(我不知道)改变
for c in cnts :
M = cv2.moments(c)
cX = int(M["m10"] / M["m00"])
cY = int(M["m01"] / M["m00"])
x, y, w, h = cv2.boundingRect(c)
cv2.rectangle(video, (x, y), (x + w, y + h), (0, 255, 0), 2)
cv2.circle(video, (cX,cY),7,(255,255,255),-1)
if cX != cX1:
start1 = time.time()
Lenght = math.sqrt(abs(cX-cX1)*abs(cX-cX1)+abs(cY-cY1)*abs(cY-cY1))
Time = start1-end1
Velocity = Lenght/Time
print(Velocity)
end1 = time.time()
cX1 = cX
cY1 = cY
您是否可以获得帧时间并在此值之间测量帧之间的速度:
_, frame1 = video.read()
t1 = video.get(cv2.CAP_PROP_POS_MSEC)
_, frame2 = video.read()
t2 = video.get(cv2.CAP_PROP_POS_MSEC)
diff_sec = (t2 - t1) / 1000.0
好的,我修复了这段代码
for i in range(0,1):
start2 = time.time()
if start2-end2>1.0 :
cnts,_ = cv2.findContours(video, cv2.RETR_TREE , cv2.CHAIN_APPROX_SIMPLE)
end2 = time.time()