The projector is being frequently used in broad range of the photogrammetric measurements with the development of non-contact measurement in the close-range photogrammetry, because a projector can project any pattern onto the measured object for controlling and calculating. Before using a projector, the interior parameters of it have to be calibrated first. Hence, the projector calibration is a...

The most critical factor affects accuracy of a Structured Light System (SLS) is calibration. Camera calibration is easy to complete because of its extensive study. To simplify projector calibration, previous work models the projector as an inverse camera and tries to build similar 3D-2D mapping data for projector calibration. Achieved mapping data is directly fed to some classic two-step camera...

The Magic Lantern Data Projector allows a performer-participant to build sculptural glass forms that are projected, then algorithmically processed. The device re-envisions magic lantern slides as transparent, multifaceted three-dimensional glass boxes. The projected image is a palimpsest of coloured transparent glass forms (Figure 1). Servomotors position the boxes in front of a camera lens, wh...

We present a novel geometric calibration technique for scalable multi-projector displays. Geometric calibration plays an important role in the alignment of multi-projector systems to present a seamless tiling of the multiple projector displays. Multi-frequency Phase Measuring Profilometry technique for the geometric calibration is proposed in this work. The required framework for implementing t...

This paper proposes a novel method for synchronizing high frame-rate (HFR) camera with an HFR projector, using visual feedback-based synchronization algorithm streaming video sequences in real time on visible-light communication (VLC)-based system. The frame rates of the and projector are equal, their phases synchronized. A is used to mitigate complexities stabilization issues wire-based trigge...

This study reports on a measurement that is used to investigate interactivity in the classrooms and examines the impact of integrating the interactive projector into middle school science classes on classroom interactivity and students’ biology learning. A total of 126 7th grade Taiwanese students were involved in the study and quasi-experimental research with two-group posttest-only design was...

In this paper, a 3D shape acquisition system consisting of a laser projector and a video camera is described. A user projects a stripe of light to the measured 3D scene by hand. The projected light and LED markers attached to the laser projector are captured with the video camera. By estimating the 3D pose of the laser projector from the 2D locations of the markers, the distance to the surface ...

The test parameters were selected as a direct result of a previous study.1 That work involved five Liquid Crystal Display (LCD) projectors and two projectors based on Digital Light ProcessingTM technology. The sample size for this test was increased to seven LCD projectors and nine DLPTM projectors. Like the previous work, this study was supported by Texas Instruments Incorporated (TI). TI pers...