嘿大家我非常喜欢编程和python-opencv一般,我已经为此寻找答案,但我找不到它。
我尝试使用我的网络摄像头进行动作追踪:
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
我不知道这是使用它的最好方法但是我会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(如果有的话)气泡弹出。
提前致谢
答案 0 :(得分:3)
试试这个:
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two values,第二个是图像