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delay the camera intialization

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Endre Simo
2019-02-05 07:39:28 +02:00
parent 4d56440cb9
commit 6500303155
1 changed files with 7 additions and 1 deletions
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8
examples/python/demo.py
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@@ -19,9 +19,9 @@ class GoPixelSlice(Structure):
("pixels", POINTER(c_ubyte)), ("len", c_longlong), ("cap", c_longlong),
]
# Obtain the camera pixels and transfer them to Go trough Ctypes.
def process_frame(pixs):
dets = numpy.zeros(3*MAX_NDETS, dtype=numpy.float32)
pixs = pixs.flatten()
pixels = cast((c_ubyte * len(pixs))(*pixs), POINTER(c_ubyte))
# call FindFaces
@@ -44,13 +44,19 @@ def process_frame(pixs):
return dets
# initialize the camera
cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
# Changing the camera resolution introduce a short delay in the camera initialization.
# For this reason we should delay the object detection process with a few milliseconds.
time.sleep(0.3)
while(True):
ret, frame = cap.read()
pixs = numpy.ascontiguousarray(frame[:, :, 1].reshape((frame.shape[0], frame.shape[1])))
pixs = pixs.flatten()
# Verify if camera is intialized by checking if pixel array is not empty.
if numpy.any(pixs):