Acquiring the initial value of all profile of the object is essential for the integration of metrical data. It is described a new smart approach to acquire the initial value of all profile of the object in this paper, which is only to compute the calibration parameters of CCD camera and the projector in every angle, but not to do the complicated coordinate conversion. In the origin position the...

This paper describes the use of computer vision to support the operation of a handheld projector, and describes four applications. Projectors in the past have been used as fixed devices, but the latest generation of ’pocket projectors’ is small and portable. We demonstrate the feasibility of using a projector held in the hand, and the types of applications that can be done with a handheld proje...

In computed tomography (CT), reconstructions from conebeam (CB) data acquired with a polychromatic X-ray device show so called beam hardening artifacts. Beam hardening artifacts are highly undesirable for a medical diagnosis, because details in the reconstructed image are severely disturbed or completely lost. In this work, we demonstrate the significant reduction of beam hardening artifacts by...

In this paper we proposed a method for geometric calibration of a projector. This method makes use of a calibrated camera to calibrate the projector. Since the projector works inversely with a camera i.e., it projects the image instead of capturing it, so it can be considered as a reverse camera. The projector is calibrated with the help of a calibrated camera using two types of chessboard, a p...

We present a novel method for 3D shape acquisition, based on mobile structured light. Unlike classical structured light methods, in which a static projector illuminates the scene with dynamic illumination patterns, mobile structured light employs a moving projector translated at a constant velocity in the direction of the projector’s horizontal axis, emitting static or dynamic illumination. For...

This paper introduces the Everywhere Displays projector, a device that uses a rotating mirror to steer the light from an LCD projector onto different surfaces of an environment and a pan/tilt camera to sense interaction with the projected surface. The ED-projector is a generic I/O ubiquitous device that is able to create graphical interfaces on non-wired surfaces, to access computational power ...

Augmented Reality is an emerging research field, that aims for the composition of real and virtual imagery, by means of a camera and display device. Spatial augmented reality employs data projectors to augment the real world. In this setting, traditional tracking methods fall short due to the interference caused by the projector. Recent works assume a calibration process to model the projector ...

A rotating-and-warping projector / backprojector is proposed for iterative algorithms used to reconstruct fanbeam and cone-beam single photon emission computed tomography (SPECT) data. The development of a new projector/ backprojector for implementing attenuation, geometric point response, and scatter models is motivated by the need to reduce the computation time yet to preserve the fidelity of...