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JetsonHacksNano / CSI-Camera / simple_camera.py

proin 2020.08.31 14:51 조회 수 : 2

https://github.com/JetsonHacksNano/CSI-Camera/blob/master/simple_camera.py

 

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  # MIT License
  # Copyright (c) 2019 JetsonHacks
  # See license
  # Using a CSI camera (such as the Raspberry Pi Version 2) connected to a
  # NVIDIA Jetson Nano Developer Kit using OpenCV
  # Drivers for the camera and OpenCV are included in the base image
   
  import cv2
   
  # gstreamer_pipeline returns a GStreamer pipeline for capturing from the CSI camera
  # Defaults to 1280x720 @ 60fps
  # Flip the image by setting the flip_method (most common values: 0 and 2)
  # display_width and display_height determine the size of the window on the screen
   
   
  def gstreamer_pipeline(
  capture_width=1280,
  capture_height=720,
  display_width=1280,
  display_height=720,
  framerate=60,
  flip_method=0,
  ):
  return (
  "nvarguscamerasrc ! "
  "video/x-raw(memory:NVMM), "
  "width=(int)%d, height=(int)%d, "
  "format=(string)NV12, framerate=(fraction)%d/1 ! "
  "nvvidconv flip-method=%d ! "
  "video/x-raw, width=(int)%d, height=(int)%d, format=(string)BGRx ! "
  "videoconvert ! "
  "video/x-raw, format=(string)BGR ! appsink"
  % (
  capture_width,
  capture_height,
  framerate,
  flip_method,
  display_width,
  display_height,
  )
  )
   
   
  def show_camera():
  # To flip the image, modify the flip_method parameter (0 and 2 are the most common)
  print(gstreamer_pipeline(flip_method=0))
  cap = cv2.VideoCapture(gstreamer_pipeline(flip_method=0), cv2.CAP_GSTREAMER)
  if cap.isOpened():
  window_handle = cv2.namedWindow("CSI Camera", cv2.WINDOW_AUTOSIZE)
  # Window
  while cv2.getWindowProperty("CSI Camera", 0) >= 0:
  ret_val, img = cap.read()
  cv2.imshow("CSI Camera", img)
  # This also acts as
  keyCode = cv2.waitKey(30) & 0xFF
  # Stop the program on the ESC key
  if keyCode == 27:
  break
  cap.release()
  cv2.destroyAllWindows()
  else:
  print("Unable to open camera")
   
   
  if __name__ == "__main__":
  show_camera()

 

 

 

 

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