At specified Reynolds numbers Re=ρvc/μ=5×105, this study investigates the power-extraction regime of a flapping-foil turbine executing figure-eight trajectory. This thoroughly explored impacts trajectory shape, heave and pitch amplitudes, phase difference, axis location on flapping turbine. A substantially bolsters energy harvesting capacity, achieving peak efficiency up to 50%. capitalizes generated from drag encountered by foil, thereby marking significant breakthrough. could denote...

Depth information has been used in many fields because of its low cost and easy availability, since the Microsoft Kinect was released. However, Kinect-like RGB-D sensors show limited performance certain applications place high demands on accuracy robustness depth information. In this paper, we propose a sensing system that contains laser projector similar to Kinect, two infrared cameras located both sides projector, obtain higher spatial resolution We apply block-matching algorithm estimate...

In this paper an algorithm is presented to extract the valid depth data and correct values of flying pixels by using information confidence image. An adaptive segmentation for measured image executed based on kernel density estimation one-pass connected component labeling. Then a modified structure tensor used detect invalid contained in Finally these are corrected with bi-cubic interpolation method or selectively removed voting operation. And also, erroneous excluded augmented confidence....

This paper proposes an efficient scheme to automatically achieve the 2D 3D video conversion, which exploits different algorithms based on spatio-temporal relationship of image sequences. For static sceneries, we directly use geometrical transformation generate a pair eyes' frames; while for motion ones, firstly extract depth map frame, then rendering (DIBR) algorithm render two viewpoints' frames. Experimental results show that proposed method can conversion effectively and successfully.

The great advantage of Microsoft Kinect makes the depth acquisition real-time and inexpensive. But maps directly obtained with device have absent regions holes caused by optical factors. noisy affect lots complex tasks in computer vision. In order to improve quality maps, this paper presents an efficient image inpainting strategy which is based on watershed segmentation region merging framework corresponding color images. primitive produced transform are merged into lager according...

This paper presents a Very large scale integration (VLSI) design method for Three-dimensional (3D) depth perception chip based on infrared coding structure light. The primary sub-modules the contain speckle pattern preprocessing module, block-matching disparity estimation, mapping and post-processing. employs pipelining technology, after Application specific integrated circuit (ASIC) verification, it proves that our has more advantages in performance of precision (12bits, 1mm @ 1m), image...

As the demand for 3DTV keep increasing these years, conversion from exist 2D videos to 3D ones becomes a new area of research. Depth map generation plays key point in process. Two most important clues depth are geometry scene and motion vector. This paper presents an algorithm generation, which intends get combines two aspects information. Compared previous work, our method is improved finding vanishing point, detect vectors, generation.

Abstract The line structure light three-dimensional reconstruction system is a kind of non-contact measurement system, which has the advantages high precision, speed, small damage to objects and strong adaptability. Camera calibration major factor that constrains accuracy 3D systems. camera based on pinhole imaging model, through series complex calculations, camera’s internal parameters (focal length, distortion coefficient) external (rotation matrix translation vector). different methods...

Abstract Line lasers are of great significance in many fields such as industrial inspection, machine vision, cultural relics identification, mechanical design, and medical oral cavity. The three-dimensional reconstruction the line laser can accurately obtain information surface object, quickly complete contour object to be tested. In online rotation scanning, rotates around a certain point, which is center, calibration center main factor that restricts accuracy contour. At present, mainly...