def get_T_cam_world(self, from_frame, to_frame, config_path='./'):
""" get transformation from camera frame to world frame"""
transform_filename = config_path + "/" + from_frame + '_' + to_frame + '.tf'
if os.path.exists(transform_filename):
return RigidTransform.load(transform_filename)
time = 0
trans = None
qat = None
self.tl = tf.TransformListener()
while not rospy.is_shutdown():
try:
time = self.tl.getLatestCommonTime(to_frame, from_frame)
(trans, qat) = self.tl.lookupTransform(to_frame, from_frame,
time)
break
except (tf.Exception, tf.LookupException, tf.ConnectivityException,
tf.ExtrapolationException):
print 'try again'
continue
RT = RigidTransform()
#print qat
qat_wxyz = [qat[-1], qat[0], qat[1], qat[2]]
#rot = RT.rotation_from_quaternion(qat_wxyz)
#print trans
#print rot
#return RigidTransform(rot, trans, from_frame, to_frame)
ans = RigidTransform(translation=trans,
rotation=qat_wxyz,
from_frame=from_frame,
to_frame=to_frame)
ans.save(transform_filename)
return ans
k += 1
import IPython
IPython.embed()
R_cb_world = best_R_cb_world
T_corrected_cb_world = RigidTransform(rotation=R_cb_world,
from_frame='world',
to_frame='world')
R_cb_world = R_cb_world.dot(T_cb_world.rotation)
T_cb_world = RigidTransform(rotation=R_cb_world,
translation=T_cb_world.translation,
from_frame=T_cb_world.from_frame,
to_frame=T_cb_world.to_frame)
T_camera_world = T_cb_world * reg_result.T_camera_cb
T_cb_world.save(config['chessboard_tf'])
# vis
if config['vis_points']:
_, depth_im, _ = sensor.frames()
points_world = T_camera_world * ir_intrinsics.deproject(depth_im)
true_robot_points_world = PointCloud(np.array([T.translation for T in robot_poses]).T,
frame=ir_intrinsics.frame)
est_robot_points_world = T_camera_world * PointCloud(np.array(robot_points_camera).T,
frame=ir_intrinsics.frame)
mean_est_robot_point = np.mean(est_robot_points_world.data, axis=1).reshape(3,1)
est_robot_points_world._data = est_robot_points_world._data - mean_est_robot_point + mean_true_robot_point
fixed_robot_points_world = T_corrected_cb_world * est_robot_points_world
mean_fixed_robot_point = np.mean(fixed_robot_points_world.data, axis=1).reshape(3,1)
fixed_robot_points_world._data = fixed_robot_points_world._data - mean_fixed_robot_point + mean_true_robot_point
vis3d.figure()
return LA.norm(m_p - base_p)
if __name__ == "__main__":
"""
Run to register camera make sure cheesboard can be seen in image
"""
logging.getLogger().setLevel(logging.INFO)
cfg_filename = 'cfg/tools/register_webcam.yaml'
cfg = YamlConfig(cfg_filename)
for sensor_frame, sensor_config in cfg['sensors'].iteritems():
if sensor_config['use']:
logging.info("Registering {0}".format(sensor_frame))
cid = sensor_config['device_num']
reg = RegWC(cfg, cid)
T_mat = reg.register_chessboard()
T = RigidTransform(rotation=T_mat[:3, :3],
translation=T_mat[:, 3],
from_frame='{0}'.format(sensor_frame),
to_frame='world')
output_dir = os.path.join(cfg['calib_dir'], sensor_frame)
if not os.path.exists(output_dir):
os.makedirs(output_dir)
output_filename = os.path.join(
output_dir, '{0}_to_world.tf'.format(sensor_frame))
logging.info("Saving to {0}".format(output_filename))
T.save(output_filename)