numerous investigations have been devoted towards understanding the hydrodynamics of gas jets in fluidized beds. however, most of them address the problem from  macroscopic point of view, which does not reveal the true behavior in the jet region at the single particle level. the present work aims to understand the jet behavior from a more fundamental level, i.e. the individual particle level. a...

bstract. Motion blur is a result of finite acquisition time of practical ameras and the relative motion between the camera and moving bjects. We present a method for speed measurement of spherical bjects using motion blurred images captured by a digital camera. he object is assumed under a straight line uniform-velocity motion, nd the speed is calculated according to the imaging geometry and lu...

A digital high-speed camera in combination with a light intensiier and a exible endoscope is used to record running human speech. Due to the light absorbtion of the exible endo-scope, the recorded image sequences are too dark for human examination and too poor for digital motion analysis. Therefore, two diierent image enhancement methods are compared to improve the image sequences. Resulting tr...

BACKGROUND Many clinical studies have shown that the arm movement of patients with neurological injury is often slow. In this paper, the speed of arm movements in healthy subjects is evaluated in order to validate the efficacy of using a Kinect camera for automated analysis. The consideration of arm movement appears trivial at first glance, but in reality it is a very complex neural and biomech...

This paper describes a method to reconstruct high-speed absolute three-dimensional (3D) geometry using only three encoded 1-bit binary dithered patterns. Because of the use of 1-bit binary patterns, high-speed 3D shape measurement could also be achieved. By matching the right camera image pixel to the left camera pixel in the object space rather than image space, robust correspondence can be es...

A fundamental problem in conventional photography is that movement of the camera or captured object causes motion blur in the image. In this research, we propose coding motion-invariant blur using a programmable aperture camera. The camera realizes virtual camera motion by translating the opening, and as a result, we obtain a coded image in which motion blur is invariant with respect to object ...

A practical real-time auto-focus algorithm for digital camera ispresented. and it improves the reliability and speed of auto-focus process, especially suitable for mega-pixel high definition camera. The proposed algorithm adopts threshold gradient and edge point count technique besides focus value function, instead of traditional two-stage climbing search algorithm that uses focus value functio...

The performance and imaging characteristics of ultrahigh speed ophthalmic optical coherence tomography (OCT) are investigated. In vivo imaging results are obtained at 850nm and 1050nm using different configurations of spectral and swept source / Fourier domain OCT. A spectral / Fourier domain instrument using a high speed CMOS linescan camera with SLD light source centered at 850nm achieves spe...