一、设置 OpenCV 您已经读了这本书,因此您可能已经对 OpenCV 是什么有了个概念。 也许您听说过似乎来自科幻小说的功能,例如训练人工智能模型以识别通过相机看到的任何东西。 如果这是您的兴趣,您将不会感到失望! OpenCV 代表开源计算机视觉。 它是一个免费的计算机视觉库,可让您处理图像和视频以完成各种任务,从显示...
apple = getRandomLocation() while True: # main game loop for event in pygame.event.get(): # event handling loop if event.type == QUIT: terminate() elif event.type == KEYDOWN: if (event.key == K_LEFT or event.key == K_a) and direction != RIGHT: direction = LEFT elif (event....
cv2.setMouseCallback("image", shape_selection) # keep looping until the 'q' key is pressed while True: # display the image and wait for a keypress cv2.imshow("image", image) key = cv2.waitKey(1) & 0xFF # press 'r' to reset the window if key == ord("r"): image = clone....
cv2.namedWindow('MyWindow') cv2.setMouseCallback('MyWindow', onMouse)print'Showing camera feed. Click window or press any key to stop.'success, frame = cameraCapture.read()whilesuccessandcv2.waitKey(1) == -1andnotclicked: cv2.imshow('MyWindow', frame) success, frame = cameraCapture.rea...
starty}]direction = RIGHT# Start the apple in a random place.apple = getRandomLocation()while True: # main game loopfor event in pygame.event.get(): # event handling loopif event.type == QUIT:terminate()elif event.type == KEYDOWN:if (event.key == K_LEFT or event.key == K_a)...
direction = RIGHT# Start the apple in a random place.apple = getRandomLocation()whileTrue:# main game loopforeventinpygame.event.get():# event handling loopifevent.type== QUIT: terminate()elifevent.type== KEYDOWN:if(event.key == K_LEFTorevent.key == K_a)anddirection != RIGHT: ...
the while loop until the user presses the key “a”. On pressing other keys, theis_pressed()function returnsFalse, and the while loop keeps executing. Once the user presses“a”,the condition inside if block becomes true and the break statement is executed. Hence the while loop terminates....
The distance variable starts at 200, so on the first iteration of the while loop, the first drag() call drags the cursor 200 pixels to the right, taking 0.2 seconds ?. distance is then decreased to 195 ?, and the second drag() call drags the cursor 195 pixels down ?. The third ...
I made it return a bool so it is suitable for using in a loop. For example... Copy to Clipboard while anykey("Press 'q' to quit.", 'qQ'): pass # keep prompting until user presses 'q' or 'Q' It also deals with the problem of getch() not handling Ctrl+C properly. It's a...
def run(self): """Run the main loop.""" self._windowManager.createWindow() while self._windowManager.isWindowCreated: self._captureManager.enterFrame() frame = self._captureManager.frame if frame is not None: # TODO: Filter the frame (Chapter 3). pass self._captureManager.exitFrame()...