[英]New to Python Opencv: Motion Tracking using webcam Thresholding/dilate
嘿大家我非常喜欢编程和python-opencv一般,我已经找到了答案,但我找不到它。
我试图使用我的网络摄像头进行运动跟踪:
但是当我尝试阈值并在帧的差异中应用扩张时,我收到错误:
t_minus_dilate = cv2.dilate(t_minus_thresh, es)
TypeError: <unknown> is not a numpy array
这意味着使用的帧不是一个numpy数组?
这是我的代码的一部分:
cv2.namedWindow("window_b", cv2.CV_WINDOW_AUTOSIZE)
# Structuring element
es = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (9,4))
## Webcam Settings
capture = cv2.VideoCapture(0)
def diffImg(t0, t1, t2): #calculates the difference between frames
d1 = cv2.absdiff(t2, t1)
d2 = cv2.absdiff(t1, t0)
return cv2.bitwise_and(d1, d2)
t_minus = cv2.cvtColor(capture.read()[1], cv2.COLOR_RGB2GRAY)
t_minus_thresh = cv2.threshold(t_minus, 0, 255, cv2.THRESH_OTSU)
t_minus_dilate = cv2.dilate(t_minus_thresh, es)
t = cv2.cvtColor(capture.read()[1], cv2.COLOR_RGB2GRAY)
t_thresh = cv2.threshold(t, 0, 255, cv2.THRESH_OTSU)
t_dilate = cv2.dilate(t_minus_thresh, es)
t_plus = cv2.cvtColor(capture.read()[1], cv2.COLOR_RGB2GRAY)
t_plus_thresh = cv2.threshold(t_plus, 0, 255, cv2.THRESH_OTSU)
t_plus_dilate = cv2.dilate(t_plus_thresh, es)
while True:
diff = diffImg(t_minus_dilate, t_dilate, t_plus_dilate) #difference between the frames
cv2.imshow('window_b',diff)
t_minus_dilate = t_dilate
t = diff
t_plus_dilate = cv2.dilate(diff, es)
key = cv2.waitKey(10) #20
if key == 27: #exit on ESC
cv2.destroyAllWindows()
break
我不知道它是使用它的最佳方式但是我将使用这个代码制作一个游戏,目标是弹出落在屏幕上的气泡,如果气泡所在的位置(如果有白色像素)气泡爆裂了。
提前致谢
尝试这个:
retvel, t_minus_thresh = cv2.threshold(t_minus, 0, 255, cv2.THRESH_OTSU)
t_minus_dilate = cv2.dilate(t_minus_thresh, es)
cv2.threshold返回两个值 ,第二个是图像
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