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One of the most important element for human survival is agricultural production. In order to provide efficient crop production, a lot of automotive devices and techniques are used in the farmland. In this paper, we proposed a farmland IoT and crops growth monitoring system to improve the crops production. We design and deploy weather boxes and wifi cameras in the field to collect weather data and...
Conventional Fourier transform profilometry (FTP) suffers from spectrum overlapping arising from ambient light, surface reflectivity and system nonlinearity. In this paper, we propose a binary coding strategy to address the problem. First, we decompose a grayscale FTP pattern into a serial of binary patterns; second, we project the binary patterns onto a target and image the corresponding patterned...
Person re-identification is a challenging problem in multi-camera surveillance systems. Most current methods always aim at learning a global distance metric to overcome the visual appearance changes between images from different cameras. However, the feature variations between images are not constant over the entire feature space, thus one global metric is not always applicable to all feature variation...
Person re-identification is a challenging problem in computer vision due to large variations of appearance among different cameras. Recently, metric learning is widely used to model the transformation between cameras. However, traditional metric learning based methods only learn one metric for the whole feature space, which cannot model different kinds of appearance variations well. In this paper,...
Phase measuring profilometry is a method for measuring the 3D profile of objects. The method is known for its accuracy and high speed. In real world applications, however, the 3D reconstructions of the high-contrast regions have large measurement errors due to the smoothing effect by digital cameras. In this paper, we model the smoothing as a mathematical smooth mask applying process. Accordingly,...
To overcome the phase error caused by the partial intensity saturation in phase measuring profilometry, this paper studies the relative phase error caused by partial saturation. Moreover, an improved algorithm for phase reconstruction with partial saturated intensity is proposed. Compared with other phase-recovering methods, the improved algorithm is not limited to saturation coefficient. Finally...
This paper presents a novel method for generating multi-view video. The video can be viewed without wearing a pair of glasses which is more suitable for outdoor bulletin board of kiosk applications. One of the major aspects of the new method is that the depth estimation is not required. Hence, no depth warp induced holes will be introduced. Our method first extracts feature correspondence from a Left/Right...
Phase shifting structured light illumination for range sensing involves projecting a set of grating patterns where accuracy is determined, in part, by the number of stripes. However, high pattern frequencies introduce ambiguities during phase unwrapping. This paper proposes a process for embedding a period cue into the projected pattern set without reducing the signal-to-noise ratio. As a result,...
In this paper we tackle the task of picking parts from a bin (bin-picking task), employing a 6-DOF manipulator on which a single hand-eye camera is mounted. The parts are some cylinders randomly stacked in the bin. A Quasi-Random Sample Consensus (Quasi-RANSAC) ellipse detection algorithm is developed to recognize the target objects. Then the detected targets' position and posture are estimated utilizing...
Probe car system is used to provide real-time traffic information for telematics service. Although probe car technology is a well-known technology, how to appropriately evaluate the accuracy of a probe car system is still an unsolved issue. This paper compares several methods that are applied in the evaluation of probe car system. The shortcoming of each method is shown through data analysis of field...
The present work aims at studying the cooling performance of a thermoelectric device that integrated with integrated heat spreader (IHS) on a flip-chip plastic ball grid array (FC-PBGA) package. The new thermoelectric device herein is fabricated on the metal substrates by flip-chip assembly process. Thermal performance of the new package was comprehensive studied. The thermal resistances of IHS with/without...
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