a fiducial marker system using digital techniques

For example, a fiducial printed on one page of an augmented reality popup book would identify the page to allow the system to select the augmentation content. They can establish the identity of the scene or objects within the scene. Fiducials of known pattern and size can serve as real world anchors of location, orientation and scale. In applications of augmented reality, fiducials help resolve several problems of integration between the real world view and the synthetic images that augment it.

Augmented reality Ĭomparison of some augmented reality fiducial markers for computer vision This method of positioning has since been replaced by GPS, but the term 'fiducial' continues to be used as the time reference for data measured during flights. This application of the term evolved from air photo frame numbers that were originally used to locate geophysical survey lines in the early days of airborne geophysical surveying. Geographical survey Īirborne geophysical surveys also use the term 'fiducial' as a sequential reference number in the measurement of various geophysical instruments during a survey flight.

Such marks are closely related to the timing marks used in optical mark recognition. Cameras outfitted with Réseau plates produce these reference marks (also called Réseau crosses) and are commonly used by NASA.

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. On NASA photographs, crosshair reticles on a Réseau plate enable distortions due to processing and handling to be detected and corrected.

A fiducial marker system using digital techniques