def update_background(self, frame=None):
if frame is None:
frame = self.last_frame
if frame is None:
frame = self.grab_frame()
self.background = clone_image(frame)
self.background_gray = to_gray_image(self.background)
self.background_flipped = flip_image(self.background)
def update_background(self, frame=None): if frame is None: frame = self.last_frame if frame is None: frame = self.grab_frame() self.background = clone_image(frame) self.background_gray = to_gray_image(self.background) self.background_flipped = flip_image(self.background)
def grab_frame(self):
ret, frame = self.camera.read()
frame_gray = to_gray_image(frame)
frame_flipped = flip_image(frame)
# Set the size of things if this is the first image we have seen
if self.last_frame is None:
self.size = frame.shape
self.num_pixels = self.size[0]*self.size[1]
self.recent_frames_gray.append(frame_gray)
self.recent_frames.append(frame)
if len(self.recent_frames) > self.recent_frames_max:
del self.recent_frames[0]
del self.recent_frames_gray[0]
self.last_frame = clone_image(frame)
self.last_frame_flipped = frame_flipped
self.last_frame_gray = frame_gray
return frame
def grab_frame(self): frame = cv.QueryFrame(self.camera) frame_gray = to_gray_image(frame) frame_flipped = flip_image(frame) # Set the size of things if this is the first image we have seen if self.last_frame is None: self.size = cv.GetSize(frame) self.num_pixels = self.size[0]*self.size[1] self.recent_frames_gray.append(frame_gray) self.recent_frames.append(frame) if len(self.recent_frames) > self.recent_frames_max: del self.recent_frames[0] del self.recent_frames_gray[0] self.last_frame = clone_image(frame) self.last_frame_flipped = frame_flipped self.last_frame_gray = frame_gray return frame
