Tapster 3 - Camera Setting Test.py

1_tapster_camera_setting_test.py

import os
import cv2
import time

# Set image resolution

# Option 1
#frame_width = 4656
#frame_height = 3496

# Option 2
frame_width = 3840  # "4K" resolution
frame_height = 2160

# Option 3
#frame_width = 2592
#frame_height = 1944

# Option 4
#frame_width = 2320  # Slower resolution, but might be faster...
#frame_height = 1744

# Set goal Frame Per Second rate
fps = 5

def camera_config():
    print("Camera config: Starting")

    # Focus

    # focus_automatic_continuous
    #   default=1
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=focus_automatic_continuous=1")
    time.sleep(3)
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=focus_automatic_continuous=0")

    # focus_absolute
    #   min=1 max=1023 default=1
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=focus_absolute=432")


    # Exposure

    # auto_exposure
    #   default=3
    #   1: Manual Mode
    #   3: Aperture Priority Mode
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=auto_exposure=3")
    time.sleep(.5)
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=auto_exposure=1")

    # exposure_time_absolute
    #   min=1 max=5000 default 157
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=exposure_time_absolute=1900")


    # White Balance

    # white_balance_automatic
    #   default=1
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=white_balance_automatic=1")
    time.sleep(.5)
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=white_balance_automatic=0")

    # white_balance_temperature
    #  min=2800 max=6500 default=4600
    os.system("v4l2-ctl --device /dev/video0 --set-ctrl=white_balance_temperature=1000")

    time.sleep(1)
    print("Camera config: Complete")


if __name__ == "__main__":
  # Open connection to camera
  cap = cv2.VideoCapture("/dev/video0", cv2.CAP_V4L)

  cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc(*'MJPG'))
  cap.set(cv2.CAP_PROP_FRAME_WIDTH, frame_width)
  cap.set(cv2.CAP_PROP_FRAME_HEIGHT, frame_height)

  # Get the settings (to make sure they were set correctly)
  prop_width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
  prop_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
  print("Camera resolution: " + str(prop_width) + "x" + str(prop_height))

  # Read one frame.
  # Apparently other camera settings get reset by the first cap.read(),
  # ... so we need to read a frame before we change any other camera settings
  grabbed, frame = cap.read()

  # Set camera configuration
  camera_config()

  # Read frames and write the last one to file.
  # This flushes out the initial frames from the camera's buffer that
  # might be out of focus.
  for i in range(20):
    grabbed, frame = cap.read()

  # Get a frame and write to disk...
  grabbed, frame = cap.read()
  cv2.imwrite("frame.jpg", frame)

  # We're done!
  cap.release()

2_frame.jpg