camera-util

Camera Util

A collection of python threaded camera support routines for

• USB and laptop internal webcams
• RTSP streams
• MIPI CSI cameras (Raspberry Pi, Jetson Nano)
• FLIR blackfly USB camera

Save data as, HDF5, TIFF, AVI, MKV

Works on most platforms: Windows, MacOS, Unix

For detailed documentation please Readme.md <https://github.com/uutzinger/camera/blob/master/README.md>_.

Example program using camera

.. code-block:: python

import cv2 import logging import time

configs = { 'camera_res' : (1920, 1080), # CAP_PROP_FRAME_WIDTH, CAP_PROP_FRAME_HEIGHT 'exposure' : -6, # depends on camera: e.g. -5 =(2^-5)=1/32, # 0=auto, 1...max=frame interval in microseconds 'autoexposure' : 3.0, # depends on camera: 0.25 or 0.75(auto), -1,0,1 'fps' : 30, # fps 'fourcc' : "MJPG", # cv2 camera only: MJPG, YUY2, YUYV 'buffersize' : -1, # default is 4 for V4L2, max 10, 'output_res' : (-1, -1), # output resolution (-1=no change) 'flip' : 0, # 0=no rotation 'displayfps' : 5 # frame rate for display server }

if configs['displayfps'] >= configs['fps']: display_interval = 0 else: display_interval = 1.0/configs['displayfps']

Open display window

cv2.namedWindow('Camera', cv2.WINDOW_AUTOSIZE) # or WINDOW_NORMAL

Setting up logging

logging.basicConfig(level=logging.DEBUG) # options are: DEBUG, INFO, ERROR, WARNING logger = logging.getLogger("Main")

Setting up storage

from camera.streamer.mkvstorageserver import mkvServer mkv = mkvServer("C:\temp\" + "Test.mkv", configs['fps'], configs['camera_res']) mkv.start()

Create camera interface

from camera.capture.cv2capture import cv2Capture camera = cv2Capture(configs, 0) camera.start()

stop = False while(not stop): current_time = time.time()

  # Wait for new image
  (frame_time, frame) = camera.capture.get(block=True, timeout=None)
  # take care of camera log messages
  while not camera.log.empty():
     (level, msg)=camera.log.get_nowait()
     logger.log(level, msg)


  # Put image into storage queue
  if not mkv.queue.full():
     mkv.queue.put_nowait((frame_time, frame)) 
  # take care of storage log messages
  while not mkv.log.empty():
     (level, msg)=mkv.log.get_nowait()
     logger.log(level, msg)

  # Display
  if (current_time - last_display) >= display_interval:
     cv2.imshow('Camera', frame)
     if cv2.waitKey(1) & 0xFF == ord('q'): stop = True
     if cv2.getWindowProperty('Camera', 0) < 0: stop = True
     last_display = current_time

  # Do other things 

Clean up

camera.stop() mkv.stop() cv2.destroyAllWindows()