Existing noncontact methods for surface measurement suffer from the disadvantages of poor reliability, low scanning speed, or high cost. The authors present a method for real-time three-dimensional data acquisition by a color-coded vision sensor composed of common components. The authors use a digital projector controlled by computer to generate desired color light patterns. The unique indexing...

In this brief we present a design of full-duplex (FD) underwater acoustic communication (UAC) receiver with two-sensor transducer. The transducer consists two piezo-ceramic cylinders cast together in polyurethane resin; one acts as hydrophone and the other projector. As distance between projector is extremely short, high level self-interference (SI) from received at hydrophone. This SI must be ...

There has been considerable interest in immersive and realistic virtual environment system and how to improve human and computer interaction has been a main challenge. For vision-based human-computer interaction, extraction of user region from camera images is an essential part. In this paper, we propose a background subtraction method that segments dynamic projected background in a rear-projec...

This paper examines a steerable projection system, the everywhere displays projector (ED-projector), which transforms surfaces into interactive displays. In an ED-projector, the display image is directed onto a surface by a rotating mirror. Oblique projection distortion is removed by a computer-graphics reverse-distortion process and user interaction (pointing and clicking) is achieved by detec...

Video projectors and cameras are widely used in augmented environment applications, such as telepresence, smart rooms or immersive spaces. In this paper we discuss the potential of camera-projector systems as sensor-actuator devices that are particularly suitable for robots operating in human-populated environments. A brief review of sensing techniques and possible applications involving the us...

Unmatched pairs of forward and back projectors are common in X-ray CT computations for large-scale problems; they caused by the need fast algorithms that best utilize computer hardware, it is an interesting challenging task to develop easy-to-use these cases. Our approach use preconditioned GMRES, form AB- BA-GMRES algorithms, handle unmatched normal equations associated with pair. These simple...

This paper discusses the design methodology for the active noise control of sound disturbances in a forced-air cooling system. The active sound cancellation algorithm uses the framework of output-error based optimization of a linearly parametrized filter for feedforward sound compensation to select microphone location and demonstrate the effectiveness of active noise cancellation in a small por...

Due to several industrial requirements we were exploring the use of projective displays as an alternative to Augmented Reality user interfaces based on HMDs. This resulted in the development of an Augmented Reality Laser Projector. In this demo we show the laser projector in combination with an easy to use and easy to adapt markerless tracking system. Almost any pseudo planar object can be taug...