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camerathread.py
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camerathread.py
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import sys
import time
import numpy as np
import ximea as xi
from qtpy import QtCore
class CameraThread(QtCore.QObject):
ImageReadySignal = QtCore.Signal(np.ndarray)
exposure_us = 150000
#mutex = QtCore.QMutex()
enabled = False
def __init__(self,xflip = False,yflip = False, parent=None):
if getattr(self.__class__, '_has_instance', False):
RuntimeError('Cannot create another instance of Camera')
self.__class__._has_instance = True
self.yflip = yflip
self.xflip = xflip
self.isinitialized = False
super(CameraThread, self).__init__(parent)
self._cam = None
try:
self.abort = False
self.thread = QtCore.QThread()
num_dev = xi.get_device_count()
if num_dev > 0:
print(xi.get_device_info(0, 'device_name'))
self._cam = xi.Xi_Camera(DevID=0)
self._cam.set_debug_level("Error")
self._cam.set_param('exposure', self.exposure_us)
self._cam.set_param('aeag', 0)
self._cam.set_param('exp_priority', 0)
self._cam.set_binning(2, skipping=False)
#self._cam.set_param('imgdataformat',2) # RGB24
#self._cam.set_param('imgdataformat', 6) # RAW16 (monochrome)
self._cam.set_param('imgdataformat', 1) # MONO16
#self._cam.set_param('buffers_queue_size',1)
self._cam.get_image()
self.thread.started.connect(self.process)
self.thread.finished.connect(self.stop)
self.moveToThread(self.thread)
self.isinitialized = True
except:
(type, value, traceback) = sys.exc_info()
sys.excepthook(type, value, traceback)
def __del__(self):
self.abort = True
self.__class__.has_instance = False
try:
if not self._cam is None:
self._cam.close()
self.ImageReadySignal.disconnect()
except TypeError as e:
print(e)
def set_exposure(self, us):
self.exposure_us = us
self._cam.set_param('exposure', us)
def get_exposure(self):
us = self._cam.get_param('exposure')
return us
def start(self):
self.thread.start()
def enable(self):
self.enabled = True
def disable(self):
self.enabled = False
@QtCore.Slot()
def stop(self):
self.abort = True
def get_image(self):
# if self.enabled:
# self.enabled = False
# img = self._cam.get_image()
# self.enabled = True
# else:
# img = self._cam.get_image()
img = np.array(self._cam.get_image(),dtype = np.int32)
img = img[:,:,0] + np.left_shift(img[:,:,1],8)
if self.xflip:
img = np.flipud(img)
if self.yflip:
img = np.fliplr(img)
return img
def work(self):
if self.enabled:
img = np.array(self._cam.get_image(),dtype = np.int32)
img = img[:,:,0] + np.left_shift(img[:,:,1],8)
if self.xflip:
img = np.flipud(img)
if self.yflip:
img= np.fliplr(img)
self.ImageReadySignal.emit(img)
@QtCore.Slot()
def process(self):
while not self.abort:
try:
t = self.exposure_us / 1e6
if t > 0.1 :
time.sleep(t)
else:
time.sleep(0.1)
self.work()
except:
(type, value, traceback) = sys.exc_info()
sys.excepthook(type, value, traceback)
#self._cam.stop_aquisition()