def test_init_start_stop(self):
"""Test camera's thread init/start/stop methods."""
camera = Camera()
camera.start()
time.sleep(1)
image = bgr8_to_jpeg(camera.value)
camera.stop()
# Check if image changed after stopping
assert image == bgr8_to_jpeg(camera.value)
class Observer:
def __init__(self, camera_width, camera_height):
self.camera = Camera(width=camera_width, height=camera_height)
self.image = None
def start(self):
self.camera.observe(self._callback, names='value')
self.camera.start()
def stop(self):
self.camera.stop()
def _callback(self, change):
img = change['new']
# Change BGR TO RGB HWC
self.image = img[:, :, ::-1]
def observation(self):
while self.image is None:
pass
return self.image
from jetbot import Camera
import cv2
camera = Camera()
camera.start()
print(camera.value.shape)
cv2.imwrite('snapshots/1.png', camera.value,
[int(cv2.IMWRITE_JPEG_QUALITY), 95])
cv2.waitKey(0)
camera.stop()