class WebcamThread(Thread):
def __init__(self, device, width, height, color='RGB'):
'''Intialize device
'''
self._cam = Camera(device, width, height)
self.width, self.height = self._cam.width, self._cam.height
self.running = True
self.img = None
self.t_wait = 1.0 / 60 # Webcam operates at 30FPS
super().__init__()
def run(self):
'''Thread loop. Read continuously from cam buffer.
'''
while self.running:
self.img = self._cam.get_frame()
sleep(self.t_wait)
self._cam.close()
def capture(self, path_file):
'''Capture image into a file
'''
image = self.get_img()
image.save(path_file)
def get_img(self):
return Image.frombytes('RGB', (self.width, self.height), self.img,
'raw', 'RGB')
def close(self):
'''Stop webcam and thread
'''
self.running = False
def video_capture(video_device_index):
video_device_name = '/dev/video{}'.format(video_device_index)
camera = Camera(video_device_name)
try:
yield camera
finally:
camera.close()
from PyV4L2Camera.camera import Camera
from PyV4L2Camera.controls import ControlIDs
camera = Camera('/dev/video0', 1920, 1080)
controls = camera.get_controls()
for control in controls:
print(control.name)
camera.set_control_value(ControlIDs.BRIGHTNESS, 48)
for _ in range(2):
frame = camera.get_frame()
# Decode the image
im = Image.frombytes('RGB', (camera.width, camera.height), frame, 'raw',
'RGB')
# Convert the image to a numpy array and back to the pillow image
arr = np.asarray(im)
im = Image.fromarray(np.uint8(arr))
print(np.mean(arr[:, :, 0]))
print(np.mean(arr[:, :, 1]))
print(np.mean(arr[:, :, 2]))
# Display the image to show that everything works fine
im.show()
camera.close()