def detect_cameras(self):
"""Detects number of cameras of each type"""
num_attempts = 10 # We'll try to detect up to 10 cameras
# -- Try to detect PT Grey Firefly Cameras -- #
temp_ff_context = fc.Context()
for i in range(num_attempts):
try:
temp_ff_context.get_camera_from_index(i)
self.cameras.append((FireFly_Camera, i))
num_attempts -= 1
except fc.ApiError:
pass
temp_ff_context.disconnect()
# -- Try to detect Mini Microscopes -- #
# Disable extraneous error messages
devnull = open(os.devnull, 'w')
stderr = sys.stderr
sys.stderr = devnull
# Check for mini microscopes
for i in range(num_attempts):
try:
cam = xi.Xi_Camera(DevID=i)
cam.get_image()
cam.close()
self.cameras.append((Mini_Microscope, i))
num_attempts -= 1
except (xi.XI_Error, xi.ximea.XI_Error):
print('xi error', i)
# Reinstate Error Messages
sys.stderr = stderr
devnull.close()
# Finalize number of cameras across processes
self.num_cmrs = len(self.cameras)
def init_ff_camera(self):
"""Initializes a PT Grey FireFly"""
try:
self.fc_context = fc.Context()
self.fc_context.connect(
*self.fc_context.get_camera_from_index(self.cmr_id))
self.fc_context.set_video_mode_and_frame_rate(
fc.VIDEOMODE_640x480Y8, fc.FRAMERATE_30)
self.fc_context.set_property(
**self.fc_context.get_property(fc.FRAME_RATE))
self.fc_context.start_capture()
except self.camera_error:
self.connected = False
else:
self.connected = True
def init_firefly_camera(self):
"""Initializes a PT Grey Firefly Camera"""
try:
self.fc_context = fc.Context()
self.fc_context.connect(
*self.fc_context.get_camera_from_index(self.cmr_id))
self.fc_context.set_video_mode_and_frame_rate(
fc.VIDEOMODE_640x480Y8, fc.FRAMERATE_30)
self.fc_context.set_property(
**self.fc_context.get_property(fc.FRAME_RATE))
self.fc_context.start_capture()
# self.status_queue.put_nowait('<cmr>Connected to Camera!')
self.connected = True
except self.camera_error:
# self.status_queue.put_nowait('<cmr>** Camera is disconnected or occupied by another program. '
# 'Please disconnect and try again.')
self.connected = False
def initialize(self):
"""checks that camera is available"""
try:
self.context = fc2.Context()
self.context.connect(*self.context.get_camera_from_index(0))
self.context.set_video_mode_and_frame_rate(fc2.VIDEOMODE_640x480Y8,
fc2.FRAMERATE_30)
self.context.set_property(
**self.context.get_property(fc2.FRAME_RATE))
self.context.start_capture()
self.status_queue.put_nowait('<cmr>Connected to Camera!')
self.connected = True
return True
except fc2.ApiError:
self.status_queue.put_nowait('<cmr>** Camera is not connected or'
' is occupied by another program. '
'Please disconnect and try again.')
self.connected = False
return False
def detect_cameras(self):
"""Detects number of cameras of each type"""
num_attempts = 10 # We look for up to 10 TOTAL cameras (all types combined)
cameras = []
# -- Detect PTGrey Fireflies -- #
temp_ff_context = fc.Context()
for cmr_id in range(num_attempts):
try:
temp_ff_context.get_camera_from_index(cmr_id)
except fc.ApiError:
pass
else:
cameras.append((FIREFLY_CAMERA, cmr_id))
num_attempts -= 1
temp_ff_context.disconnect()
# -- Detect Ximea Cameras -- #
# Disable erroneous error messages
devnull = open(os.devnull, 'w')
stderr = sys.stderr
sys.stderr = devnull
# Check for ximea cameras
for cmr_id in range(num_attempts):
try:
cam = xi.Xi_Camera(DevID=cmr_id)
cam.get_image()
cam.close()
except (xi.XI_Error, xi.ximea.XI_Error):
pass
else:
cameras.append((MINIMIC_CAMERA, cmr_id))
num_attempts -= 1
# Re-enable error messages
sys.stderr = stderr
devnull.close()
# Finalize total num cameras
self.num_cmrs = len(cameras)
# Create Cameras
for stream_index, (cmr_type, cmr_id) in enumerate(cameras):
self.cameras[stream_index] = SingleCameraWidget(self.dirs, stream_index, cmr_type, cmr_id)