def openCamera(self):
with self.mutex:
for i in range(3):
try:
self.id = nivision.IMAQdxOpenCamera(
self.name, nivision.IMAQdxCameraControlModeController)
except nivision.ImaqDxError as e:
if i == 2:
raise
time.sleep(2.0)
continue
break
def __init__(self, sn=None, alias=None):
cams = enumerate_cameras()
for cam in cams:
if alias and not sn:
if bytes(alias, encoding='ascii') == cam.InterfaceName:
self.camera = cam
print(f'Connected to {alias}.')
break
elif sn and not alias:
hi = cam.SerialNumberHi
lo = cam.SerialNumberLo
hb = hi.to_bytes(4, 'big')
lb = lo.to_bytes(4, 'big')
xx = int.from_bytes(hb + lb, 'big')
if not xx == sn:
xx = hex(xx).split('x')[-1].upper()
if isinstance(sn, str):
sn = sn.upper()
if xx == sn:
self.camera = cam
print(f'Connected to {sn}.')
break
else:
raise Exception(
'Need to define either alias or sn to connect to camera.')
try:
print('Opening camera in controller mode.')
print('self.camera.InterfaceName is', self.camera.InterfaceName)
self.imaqdx = nv.IMAQdxOpenCamera(
self.camera.InterfaceName,
nv.IMAQdxCameraControlModeController)
except AttributeError:
print('Camera not found.')
# Keep an img attribute so we don't have to create it every time
print('Creating image object.')
self.img = nv.imaqCreateImage(nv.IMAQ_IMAGE_U16)
self._abort_acquisition = False
def __init__(self, serial_number, **kwargs):
super().__init__(**kwargs)
# Find the camera:
print("Finding camera...")
for cam in nv.IMAQdxEnumerateCameras(True):
if serial_number == (
cam.SerialNumberHi << 32) + cam.SerialNumberLo:
self.camera = cam
break
else:
msg = f"No connected camera with serial number {serial_number:X} found"
raise Exception(msg)
# Connect to the camera:
print("Connecting to camera...")
self.imaqdx = nv.IMAQdxOpenCamera(self.camera.InterfaceName,
nv.IMAQdxCameraControlModeController)
# Keep an img attribute so we don't have to create it every time
self._img = nv.imaqCreateImage(nv.IMAQ_IMAGE_U16)
def __init__(self, serial_number):
global nv
import nivision as nv
_monkeypatch_imaqdispose()
# Find the camera:
print("Finding camera...")
for cam in nv.IMAQdxEnumerateCameras(True):
if serial_number == (
cam.SerialNumberHi << 32) + cam.SerialNumberLo:
self.camera = cam
break
else:
msg = f"No connected camera with serial number {serial_number:X} found"
raise Exception(msg)
# Connect to the camera:
print("Connecting to camera...")
self.imaqdx = nv.IMAQdxOpenCamera(self.camera.InterfaceName,
nv.IMAQdxCameraControlModeController)
# Keep an img attribute so we don't have to create it every time
self.img = nv.imaqCreateImage(nv.IMAQ_IMAGE_U16)
self._abort_acquisition = False
import ctypes import nivision import numpy as np import struct from library import cam_x, cam_y, cam_offset_x, cam_offset_y offsetX = cam_offset_x offsetY = cam_offset_y total_pixels = cam_x * cam_y fmt = '>' + str(total_pixels) + 'B' cam = ctypes.c_char_p(b"cam0") id = nivision.IMAQdxOpenCamera(cam, nivision.IMAQdxCameraControlModeController) img = nivision.imaqCreateImage(nivision.ImageType(0)) nivision.IMAQdxSetAttribute(id, nivision.IMAQdxAttributeOffsetX, offsetX) nivision.IMAQdxSetAttribute(id, nivision.IMAQdxAttributeOffsetY, offsetY) nivision.IMAQdxSetAttribute(id, nivision.IMAQdxAttributeWidth, cam_x) nivision.IMAQdxSetAttribute(id, nivision.IMAQdxAttributeHeight, cam_y) nivision.IMAQdxSetAttribute(id, b'CameraAttributes::Shutter::Mode', 0) nivision.IMAQdxSetAttribute(id, b'CameraAttributes::Shutter::Value', 10) nivision.IMAQdxSetAttribute(id, b'CameraAttributes::FrameRate::Mode', 0) nivision.IMAQdxSetAttribute(id, b'CameraAttributes::FrameRate::Value', 200) nivision.IMAQdxConfigureGrab(id) def capture(): nivision.IMAQdxGrab(id, img, 1) picture = nivision.imaqImageToArray(img) data = struct.unpack(fmt, picture[0]) data = np.asarray(data) data = np.reshape(data, (cam_y, cam_x))