Saliency Detection based on Global Color Distribution and Active Contour Analysis

( Zhengping Hu ),( Zhenbin Zhang ),( Zhe Sun ),( Shuhuan Zhao ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.12

In computer vision, salient object is important to extract the useful information of foreground. With active contour analysis acting as the core in this paper, we propose a bottom-up saliency detection algorithm combining with the Bayesian model and the global color distribution. Under the supports of active contour model, a more accurate foreground can be obtained as a foundation for the Bayesian model and the global color distribution. Furthermore, we establish a contour-based selection mechanism to optimize the global-color distribution, which is an effective revising approach for the Bayesian model as well. To obtain an excellent object contour, we firstly intensify the object region in the source gray-scale image by a seed-based method. The final saliency map can be detected after weighting the color distribution to the Bayesian saliency map, after both of the two components are available. The contribution of this paper is that, comparing the Harris-based convex hull algorithm, the active contour can extract a more accurate and non-convex foreground. Moreover, the global color distribution can solve the saliency-scattered drawback of Bayesian model, by the mutual complementation. According to the detected results, the final saliency maps generated with considering the global color distribution and active contour are much-improved.

Saliency Detection based on Global Color Distribution and Active Contour Analysis

Hu, Zhengping,Zhang, Zhenbin,Sun, Zhe,Zhao, Shuhuan Korean Society for Internet Information 2016 KSII Transactions on Internet and Information Syst Vol.10 No.12

In computer vision, salient object is important to extract the useful information of foreground. With active contour analysis acting as the core in this paper, we propose a bottom-up saliency detection algorithm combining with the Bayesian model and the global color distribution. Under the supports of active contour model, a more accurate foreground can be obtained as a foundation for the Bayesian model and the global color distribution. Furthermore, we establish a contour-based selection mechanism to optimize the global-color distribution, which is an effective revising approach for the Bayesian model as well. To obtain an excellent object contour, we firstly intensify the object region in the source gray-scale image by a seed-based method. The final saliency map can be detected after weighting the color distribution to the Bayesian saliency map, after both of the two components are available. The contribution of this paper is that, comparing the Harris-based convex hull algorithm, the active contour can extract a more accurate and non-convex foreground. Moreover, the global color distribution can solve the saliency-scattered drawback of Bayesian model, by the mutual complementation. According to the detected results, the final saliency maps generated with considering the global color distribution and active contour are much-improved.

Further-inspection for Doubly-Fed Converter: Theory, Method and Experimental Platform

Zhuo Chen,Zhengping Zhang,Zhenghang Hao,Shaohua Li,Ailing Zhang 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.6

Nanometric Pd-confined mesoporous silica as high-efficient catalyst for toluene low temperature removal: Effects of support morphology and textural property

Chi He,Zhengping Hao,Xinyan Zhang,Shaokai Gao,Jinsheng Chen 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.5

Mesoporous silica supported catalysts with highly dispersed Pd particles located in their pore channels were synthesized via a novel and simple two-solvents approach. It is found that the support morphology has significant effect on active phase dispersion. Both the pore diameter and pore length of the silica hosts are critical for the catalytic performances of prepared catalysts. Catalyst with plateletlike morphology (Pd/S-P) shows the highest catalytic activity with 90% toluene conversion at 192 8C. The catalytic performances of the synthesized catalysts are closely correlated with Pd dispersion, CO2desorption capability, pore diameter and pore length of the host materials.

Multiple-Rod Constructs in Adult Spinal Deformity Surgery: A Systematic Review and Meta-Analysis

Zhao Jian,Nie Zheng,Zhang Zhengping,Liao Dongfa,Liu Da 대한척추외과학회 2023 Asian Spine Journal Vol.17 No.5

The purpose of this research was to compare the therapeutic efficacy of multiple-rod constructs vis-a-vis 2-rod constructs in the treatment of adult spinal deformity. A systematic review and meta-analysis were performed to determine whether the multiple-rod construct outperformed the 2-rod construct. We initially retrieved 357 papers, but only 12 were chosen for further meta-analysis. The rod breakage rates in the multiple-rod and the 2-rod groups were 10.66% and 29.87%, respectively. The multiple-rod construct inhibited rod breakage (odds ratio [OR], 0.28; 95% confidence interval [CI], 0.19–0.41; <i>p</i><0.001), pseudarthrosis (OR, 0.30; 95% CI, 0.18–0.50; <i>p</i><0.001) and rod fracture at the osteotomy site (OR, 0.34; 95% CI, 0.13–0.89; <i>p</i>=0.03). Furthermore, the multiple-rod construct reduces the risk of revision surgery (OR, 0.38; 95% CI, 0.20–0.73; <i>p</i>=0.04) as well as the revision risk of pseudarthrosis/rod fracture in the multiple- rod group (OR, 0.31; 95% CI, 0.18–0.52; <i>p</i><0.001), but increases the risk of caudal screw loosening (OR, 4.99; 95% CI, 1.87–13.30; <i>p</i>=0.001). There was no statistically significant difference in proximal junctional kyphosis (PJK) parameters (<i>p</i>=0.85), cerebrospinal fluid leakage (<i>p</i>=0.09), wound infection (p =0.71), age at surgery (<i>p</i>=0.62), gender distribution (<i>p</i>=0.93), body mass index (p =0.86), smoking status (<i>p</i>=0.05), hospital stay (<i>p</i>=0.09), osteoporosis (<i>p</i>=0.95), CoCr rod material (<i>p</i>=0.15), bone morphogenetic protein-2 (<i>p</i>=0.58), L5/S1 interbody fusion (<i>p</i>=0.07), high-grade osteotomies (<i>p</i>=0.07), the number of fusion levels (<i>p</i>=0.11), operation time (<i>p</i>=0.30), and blood loss volume (<i>p</i>=0.34). Regarding radiographic parameters, only preoperative sagittal vertical axis was found to be higher (weight means difference [WMD], 25.60; 95% CI, 15.43–35.77; <i>p</i><0.001) in the multiple-rod group. There was no difference in preoperative Oswestry Disability Index (ODI) (WMD, −3.32; 95% CI, −7.38 to 0.73; <i>p</i>=0.11), but the multiple-rod group had a lower ODI at follow-up (WMD, −7.71; 95% CI, −11.62 to −3.86; <i>p</i><0.001). Multiple-rod constructs could prevent rod breakage and pseudarthrosis while also lowering the revision rate, resulting in a better clinical outcome than the 2-rod construct. Nonetheless, due consideration should be given to PJK and screw loosening in multiple-rod constructs, possibly due to the increased stiffness caused by the multiple-rod structure.

Heat Shock Protein 90 Regulates the Stability of c-Jun in HEK293 Cells

Chen Lu,Dan Chen,Zhengping Zhang,Fang Fang,Yifan Wu,Lan Luo,Zhimin Yin 한국분자세포생물학회 2007 Molecules and cells Vol.24 No.2

Discrete Particle Swarm Optimization Algorithm in Flexible Hybrid Flow Shop Scheduling

Liu Dongdong,Liu Kai,Zhao Zhengping Han Bo,Zhang Yan 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.10

Traditional flexible flow shop scheduling cannot adapt to the work processes with existence of parallel machines, and blocks or limits the processes with no-wait constraints. Firstly, according to the problem in NWBFFSSP, which minimizes the maximum time used in the flow shop, an optimal solving model has been designed to realize the flexible flow shop scheduling with multi constraints; besides, for the distribution of machinery is improved, Finally, in the solving process, a real-time release priority strategy has been proposed to determine processing machine for each work piece. Furthermore, a methodology to detect work piece conflicts has been introduced while the conflicts are then eliminated by a kind of right moving strategy based on the maximum difference. The experimental results verify the effectiveness and feasibility of the proposed algorithm.

Bioprospecting of Novel and Bioactive Metabolites from Endophytic Fungi Isolated from Rubber Tree Ficus elastica Leaves

( Zhuang Ding ),( Tao Tao ),( Lili Wang ),( Yanna Zhao ),( Huiming Huang ),( Demeng Zhang ),( Min Liu ),( Zhengping Wang ),( Jun Han ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.5

Endophytic fungi are an important component of plant microbiota, and have the excellent capacity for producing a broad variety of bioactive metabolites. These bioactive metabolites not only affect the survival of the host plant, but also provide valuable lead compounds for novel drug discovery. In this study, forty-two endophytic filamentous fungi were isolated from Ficus elastica leaves, and further identified as seven individual taxa by ITS-rDNA sequencing. The antimicrobial activity of these endophytic fungi was evaluated against five pathogenic microorganisms. Two strains, Fes1711 (Penicillium funiculosum) and Fes1712 (Trichoderma harzianum), displayed broad-spectrum bioactivities. Our following study emphasizes the isolation, identification and bioactivity testing of chemical metabolites produced by T. harzianum Fes1712. Two new isocoumarin derivatives (1 and 2), together with three known compounds (3-5) were isolated, and their structures were elucidated using NMR and MS. Compounds 1 and 2 exhibited inhibitory activity against Escherichia coli. Our findings reveal that endophytic fungi from the rubber tree F. elastica leaves exhibit unique characteristics and are potential producers of novel natural bioactive products.