fiducials

The placement of the fiducials is a critical step if the fiducial tracking is to be used.

In high-resolution optical microscopy, fiducials can be used to actively stabilize the field of view.

To function properly, the Synchrony system requires that for any given correlation model there is a functional relationship between the markers and the internal fiducials.

The movements and arrangements of these fiducials are interpreted into gestures that act as interaction instructions for the projected application interfaces.

Placed onto the table are the tangibles that have fiducials attached to their underside which are seen through the table by the camera.

The ArrayGroup also records the locations of signifying marks (fiducials) and details about the array's substrate.

Some other tangibles are cubes, with fiducials attached to several sides, allowing those tangibles to serve multiple functions.

The crosses (also known as fiducials) were recorded on every exposed frame and provided a means of determining angular distances between objects in the field-of-view.

The synchrony system uses a combination of surgically placed internal fiducials, and light emitting optical fibers (markers) mounted on the patient skin.

Small metal markers (fiducials) made out of gold for bio-compatibility and high density to give good contrast on X-ray images are surgically implanted in the patient.

The fiducials are printed black and white images, consisting of circles and dots in varying patterns, optimized for use by reacTIVision.

The Synchrony system is therefore continuously predicting the motion of the internal fiducials, and therefore the tumor, based on the motion of the markers.

When X-ray camera images are taken, the location of the tumor relative to the fiducials is determined, and the radiation can be delivered to any part of the body.

The software program processes the video stream data captured by the camera and tracks the locations of the colored markers (visual tracking fiducials) at the tips of the user's fingers.

Conversely, low end, low-precision boards may only have two fiducials, or use fiducials applied as part of the screen printing process applied to most circuit boards.

If the fiducials are too far from the location of the tumor, or are not sufficiently spread out from each other it will not be possible to accurately deliver the radiation.

In applications of augmented reality or virtual reality, fiducials are often manually applied to objects in a scene so that the objects can be recognized in images of the scene.

The Synchrony system overcomes this by periodically taking images of the internal fiducials, and predicting their location at a future time using the motion of the markers that are located on the patient's skin.

In physics, 3D computer graphics, and photography, fiducials are reference points: fixed points or lines within a scene to which other objects can be related or against which objects can be measured.

Fiducials are known however to migrate and this can limit the accuracy of the treatment if sufficient time is not allowed between implantation and treatment for the fiducials to stabilize.

In the case of d-Touch, by moving marked blocks in front of a webcam to sample, edit and produce music with very low-cost paraphernalia - just a cheap microphone, printed fiducials and a standard PC.

Using three fiducials enables the machine to determine offset in both the X and Y axes, as well as to determine if the board has rotated during clamping, allowing the machine to rotate parts to be placed to match.