class CameraBundle:
def __init__(self):
self.cam = CoreCamera(index=0, resolution=(640, 480))
self.caminstance = self.cam._android_camera
def start(self):
self.cam.start()
def stop(self):
self.cam.stop()
def fps(self):
return self.cam.fps
def capture(self, n):
frames = []
st = 1.0 / 29.97
self._flash_on()
for i in range(0, n):
frames.append(self.cam.grab_frame())
sleep(st)
self._flash_off()
return frames
def decode(self, frames):
r = np.zeros((1, len(frames)))
for i in range(0, len(frames)):
frame = self.cam.decode_frame(frames[i])
frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
r[0, i] = np.mean(frame[180:260:5, 270:340:5])
print r[0, i]
return r
def _flash_on(self):
p = self.caminstance.getParameters()
p.setFlashMode(Parameters.FLASH_MODE_TORCH)
p.setExposureCompensation(-2)
self.caminstance.setParameters(p)
def _flash_off(self):
p = self.caminstance.getParameters()
p.setFlashMode(Parameters.FLASH_MODE_OFF)
p.setExposureCompensation(0)
self.caminstance.setParameters(p)
class StartWorker(Screen, Utils):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
def _on_enter(self, instance_program):
self.app = instance_program
# print('enter')
if self.camera is None:
self.camera = Camera()
self.camera.play = True
self.camera.start()
self.clear_images()
self.ids.first.texture = None
self.ids.second.texture = None
def _on_exit(self):
# print('exit')
# camera = self.ids['camera']
self.camera.play = False
self.camera.stop()
class Camera(Image):
'''Camera class. See module documentation for more information.
'''
play = BooleanProperty(True)
'''Boolean indicating whether the camera is playing or not.
You can start/stop the camera by setting this property::
# start the camera playing at creation (default)
cam = Camera(play=True)
# create the camera, and start later
cam = Camera(play=False)
# and later
cam.play = True
:attr:`play` is a :class:`~kivy.properties.BooleanProperty` and defaults to
True.
'''
index = NumericProperty(-1)
'''Index of the used camera, starting from 0.
:attr:`index` is a :class:`~kivy.properties.NumericProperty` and defaults
to -1 to allow auto selection.
'''
resolution = ListProperty([-1, -1])
'''Preferred resolution to use when invoking the camera. If you are using
[-1, -1], the resolution will be the default one::
# create a camera object with the best image available
cam = Camera()
# create a camera object with an image of 320x240 if possible
cam = Camera(resolution=(320, 240))
.. warning::
Depending on the implementation, the camera may not respect this
property.
:attr:`resolution` is a :class:`~kivy.properties.ListProperty` and defaults
to [-1, -1].
'''
def __init__(self, **kwargs):
self._camera = None
super(Camera, self).__init__(**kwargs)
if self.index == -1:
self.index = 0
on_index = self._on_index
fbind = self.fbind
fbind('index', on_index)
fbind('resolution', on_index)
on_index()
def on_tex(self, *l):
self.canvas.ask_update()
def _on_index(self, *largs):
self._camera = None
if self.index < 0:
return
if self.resolution[0] < 0 or self.resolution[1] < 0:
return
self._camera = CoreCamera(index=self.index,
resolution=self.resolution, stopped=True)
self._camera.bind(on_load=self._camera_loaded)
if self.play:
self._camera.start()
self._camera.bind(on_texture=self.on_tex)
def _camera_loaded(self, *largs):
self.texture = self._camera.texture
self.texture_size = list(self.texture.size)
def on_play(self, instance, value):
if not self._camera:
return
if value:
self._camera.start()
else:
self._camera.stop()
class Camera(Image):
'''Camera class. See module documentation for more information.
'''
play = BooleanProperty(True)
'''Boolean indicate if the camera is playing.
You can start/stop the camera by setting this property. ::
# start the camera playing at creation (default)
cam = Camera(play=True)
# create the camera, and start later
cam = Camera(play=False)
# and later
cam.play = True
:data:`play` is a :class:`~kivy.properties.BooleanProperty`, default to
True.
'''
index = NumericProperty(-1)
'''Index of the used camera, starting from 0.
:data:`index` is a :class:`~kivy.properties.NumericProperty`, default to -1
to allow auto selection.
'''
resolution = ListProperty([-1, -1])
'''Prefered resolution to use when invoking the camera. If you are using
[-1, -1], the resolution will be the default one. ::
# create a camera object with the best image available
cam = Camera()
# create a camera object with an image of 320x240 if possible
cam = Camera(resolution=(320, 240))
.. warning::
Depending of the implementation, the camera may not respect this
property.
:data:`resolution` is a :class:`~kivy.properties.ListProperty`, default to
[-1, -1]
'''
def __init__(self, **kwargs):
self._camera = None
super(Camera, self).__init__(**kwargs)
if self.index == -1:
self.index = 0
self.bind(index=self._on_index,
resolution=self._on_index)
self._on_index()
def _on_index(self, *largs):
self._camera = None
if self.index < 0:
return
self._camera = CoreCamera(index=self.index,
resolution=self.resolution, stopped=True)
self._camera.bind(on_load=self._camera_loaded)
if self.play:
self._camera.start()
def _camera_loaded(self, *largs):
self.texture = self._camera.texture
self.texture_size = list(self.texture.size)
def on_play(self, instance, value):
if not self._camera:
return
if value:
self._camera.start()
else:
self._camera.stop()
class Camera(Image):
'''Camera class. See module documentation for more informations.
'''
play = BooleanProperty(False)
'''Boolean indicate if the camera is playing.
You can start/stop the camera by setting this property. ::
# start the camera playing at creation
video = Camera(source='movie.mkv', play=True)
# create the camera, and start later
video = Camera(source='movie.mkv')
# and later
video.play = True
:data:`play` is a :class:`~kivy.properties.BooleanProperty`, default to
True.
'''
index = NumericProperty(-1)
'''Index of the used camera, starting from 0.
:data:`index` is a :class:`~kivy.properties.NumericProperty`, default to -1
to allow auto selection.
'''
resolution = ListProperty([-1, -1])
'''Prefered resolution to use when invoking the camera. If you are using
[-1, -1], the resolution will be the default one. ::
# create a camera object with the best image available
cam = Camera()
# create a camera object with an image of 320x240 if possible
cam = Camera(resolution=(320, 240))
.. warning::
Depending of the implementation, the camera may not respect this
property.
:data:`resolution` is a :class:`~kivy.properties.ListProperty`, default to
[-1, -1]
'''
def __init__(self, **kwargs):
self._camera = None
super(Camera, self).__init__(**kwargs)
if self.index == -1:
self.index = 0
self.bind(index=self._on_index, resolution=self._on_index)
self._on_index()
def _on_index(self, *largs):
self._camera = None
if self.index < 0:
return
self._camera = CoreCamera(index=self.index,
resolution=self.resolution,
stopped=True)
self._camera.bind(on_load=self._camera_loaded)
if self.play:
self._camera.start()
def _camera_loaded(self, *largs):
self.texture = self._camera.texture
self.texture_size = list(self.texture.size)
def on_play(self, instance, value):
if not self._camera:
return
if value:
self._camera.play()
else:
self._camera.stop()