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In this study, Nd2O3 was used as the dopant and the commercial Sr2SiO4:Nd phosphors was produced by using solid-state reaction method. The Sr2SiO4:Nd phosphors was sintered at the temperature range of 1000°C∼1300°C for 2 h. From the results of X-ray diffraction patterns, even sintered at 1000°C only Sr2SiO4 phase was observed, no secondary and unknown phases were residual in the calcined Sr2SiO4:Nd...
In this paper, a novel spatial error concealment (EC) algorithm is proposed. Under the sequential recovery framework, pixels in missing blocks are successively reconstructed based on adaptive linear predictor. The predictor automatically tunes its order and support shape according to local contexts. The predictor order and support shape are determined using Bayesian information criterion, which is...
Mobile comic is now evolving into an industry with great potential for its convenience, huge user base etc. A key challenge in mobile comic is to adapt the comic content to various mobile screens for better visual effect, which is also called image retargeting. Although a lot of works have been conducted in this area, most of them target on nature or natural-like images. However, cartoon images are...
In this paper, we propose a novel spatial error concealment algorithm based on adaptive linear predictor. The predictor automatically tunes its order and support shape according to local contexts. The optimal order is determined using Bayesian Index Criterion (BIC). The order-adaptive predictor is able to recover more important features or structures. Simulation results show that compared to the state-of-the-art...
Graph cut based interactive segmentation is useful to extract objects from images. Color and gradient constraints are two terms appearing in most of energy functions of related methods. In order to balance the two constraints, state-of-theart methods adopt a pre-given fixed weight. However, different images and even different parts in a single image have different demands for proportion of the two...
In order to study the feasibility of the computerized grading system of pears with rich spots, large amount of pears are put orderly in a light box, where images of different aspects of them are captured by cameras which are connected to the computer. Additionally, two methods are proposed to remove the spots on the surface of pears in the image to reduce their effect on defect detection. And advantages...
In order to realize the automatic grading system of pear's appearance quality based on computer vision, a grading system is constructed which includes hardware and software environment. It includes transport unit, control module, image acquisition module, and image processing and recognition module. It can realize automatic feature extraction. The features include shape, color and defect. According...
In this paper, we propose a novel approach that combines particle filter tracking and 3D graph cut based segmentation to achieve silhouette tracking against drastic scale change and occlusion. The segmentation module offers particle filter tracking procedure the target shape information to compensate spatial information loss in the histogram based particle filter tracking process. Meanwhile, particle...
Board level solder joint reliability performance during drop test is a critical concern to semiconductor and electronic product manufacturers. In this paper, a new compliant Wafer Level Package technology is proposed which can accommodate the CTE mismatch between the chip and PCB substrate and consequently should be more reliable without the application of underfill. The purpose of this study is to...
This paper proposes a mesh simplification method based on facial features region partition for the special three-dimensional facial mesh model. According to distribution of feature points, the face is divided into several parts consisting of critical feature regional and non-critical feature regional. This method adjusts different areas using different curvature values. This algorithm also uses edge...
This paper analyzes churn impact on replicated data duration with different node lifetime distributions. In structured overlay networks, churn includes node-join churn and node-failure churn, caused by the arrival and departure of nodes separately. The paper introduces a duration model of replicated data under node-failure churn for node failure directly leads to data loss. Furthermore, it investigates...
Many animal groups routinely make consensus decisions jointly with all group members. This paper builds a novel model merging the locally neighboring reciprocal action and alignment together to investigate the mechanisms of consensus decision-making and its robustness. Our model reveals that the shapes of the coherent flocks are limited in a common narrow interval for different group sizes and information...
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