Image Completion using Belief Propagation Based on Planar Priorities

( Mang Xiao ),( Guangyao Li ),( Yinyu Jiang ),( Li Xie ),( Ye He ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.9

Automatic image completion techniques have difficulty processing images in which the target region has multiple planes or is non-facade. Here, we propose a new image completion method that uses belief propagation based on planar priorities. We first calculate planar information, which includes planar projection parameters, plane segments, and repetitive regularity extractions within the plane. Next, we convert this planar information into planar guide knowledge using the prior probabilities of patch transforms and offsets. Using the energy of the discrete Markov Random Field (MRF), we then define an objective function for image completion that uses the planar guide knowledge. Finally, in order to effectively optimize the MRF, we propose a new optimization scheme, termed Planar Priority-belief propagation that includes message-scheduling-based planar priority and dynamic label cropping. The results of experiment show that our approach exhibits advanced performance compared with existing approaches.

Image Completion Based on Partial Region

Mang Xiao,Guangyao Li,Yunlan Tan,Lei Peng,Yangjian Lv,Li Xie 보안공학연구지원센터(IJSIP) 2014 International Journal of Signal Processing, Image Vol.7 No.4

An Action Based Access Control Model for Multi-level Security

Mang Su,Fenghua Li,Guozhen Shi,Li Li 보안공학연구지원센터 2012 International Journal of Security and Its Applicat Vol.6 No.2

A Novel Image Completion Algorithm Based on Planar Features

( Mang Xiao ),( Yunxiang Liu ),( Li Xie ),( Qiaochuan Chen ),( Guangyao Li ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.8

A novel image completion method is proposed that uses the advantage of planar structural information to fill corrupted portions of an image. First, in estimating parameters of the projection plane, the image is divided into several planes, and their planar structural information is analyzed. Second, in calculating the a priori probability of patch and patch offset regularity, this information is converted into a constraint condition to guide the process of filling the hole. Experimental results show that the proposed algorithm is fast and effective, and ensures the structure continuity of the damaged region and smoothness of the texture.

Image Completion Using Similarity Analysis and Transformation

Mang Xiao,Guangyao Li,Yunlan Tan,Jie Qin 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.4

Image completion is aim to fill the missing regions in images. A robust completion technique using similarity analysis and transformation is proposed to address this problem. Firstly, in order to decrease the search space of patches, random mapping method is used to analyze texture regions which have similar structure and texture with damaged regions. Secondly, geometric and photometric transformations of image are adopted to find the best patches. Thirdly, increasing the accuracy of the structure propagation, a priority calculation method is optimized based on confidence factor and edge information. Finally, a number of examples on real and synthetic images show the effectiveness of our algorithm for image completion.

Solution-processed organic UV photodetectors based on polyfluorene and naphthalene diimide

Hai-Guo Li,Gang Wu,Hongzheng Chen,Mang Wang 한국물리학회 2011 Current Applied Physics Vol.11 No.3

Organic ultraviolet (UV) photodetectors with bulk-heterojunction structure were fabricated via a simple spin-coating method by using blend films of poly(9,9-dihexylfluorene) (PFH) and a soluble naphthalene diimide derivative, N,N0-Bis(phenylmethyl)naphthalene-1,4,5,8-tetracarboxylic diimide (NDI-BA), which respectively act as the donor and acceptor. The effect of thermal annealing temperature together with the components blend ratio on the morphology of the composite films, and further the performance of the devices was investigated. The results indicate that balanced charge transfer and transportation can be achieved by controlling the extent of phase separation. By optimization, the device with the 1:1 (by weight) blend layer annealed at 80 ℃ for 15 min demonstrates obvious photoresponse under UV radiation. A photo-to-dark current ratio of over two orders of magnitude, fast response with decay time (decay to 1% of the value before removing of the radiation) of less than 200 ms, and a responsivity of 224 mA/W at ―4 V can be obtained under 1 mW/cm^2 UV radiation at 365 nm. The spectral response covering the region from 300 to 420 nm endows the device potential application in near-UV region as low-cost optical switches or photodetectors.

Preparation of stable gelatin/sodium carboxymethylcellulose/sodium lauryl sulfonate microcapsules with ultra-thin capsule wall for electrophoretic displays

Gang Wu,Run-Ying Dai,Weigang Li,Pei-Pei Yin,Hongzheng Chen,Mang Wang 한국물리학회 2011 Current Applied Physics Vol.11 No.3

Elastic and optical transparent microcapsules with ultra-thin and compact capsule wall for electrophoretic display containing tetrachloroethylene as core material were prepared from gelatin (GE), sodium lauryl sulfonate (SLS) and sodium carboxymethylcellulose (NaCMC) by complex coacervation method. Microcapsules were characterized by scanning electron microscopy, optical microscopy, and thermogravimetric analysis. The pH value influenced formation process was monitored by recording the microstructure of the fragment of the capsules formed at different pH value. Products with branch-like structure formed with the decrease of pH value, by which the capsule wall was knitted up to form compact structure. SLS was found to play an important role in the course of capsule formation, i.e. SLS helped to increase the interaction between gelatin and NaCMC and facilitate the complex coacervation reaction. In the case of 1.0 mM SLS addition, GE/NaCMC/SLS microcapsules with ultra-thin capsule wall,200 nm in thickness, can be prepared. The capsule owns high thermal stability and good barrier property,both of which prevent core materials from penetrating outside the capsules and are favor of the practical application for the capsules in areas of electrophoretic displays.

Adaptive ILC for Tracking Non-repetitive Reference Trajectory of 2-D FMM under Random Boundary Condition

Qing-Yuan Xu,Xiao-Dong Li,Mang-Mang Lv 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.2

Almost all of the existing research achievements in Iterative Learning Control (ILC) hitherto have beenfocused on One-Dimensional (1-D) dynamical systems. Few ILC researches are related to Two-Dimensional FornasiniMarchesina Model (2-D FMM). In this paper, an adaptive ILC approach is proposed for 2-D FMM systemwith non-repetitive reference trajectory under random boundary condition. The proposed adaptive ILC algorithmlearns the coefficient matrices of the system and updates the control input iteratively. As the times of iteration goesto infinity, the ILC tracking error outside the boundary tends to zero and all system signals keep bounded in thewhole ILC process. Illustrative examples are provided to verify the validity of the proposed adaptive ILC algorithm.

Preparation and characterization of low density polystyrene/TiO2 core–shell particles for electronic paper application

Xujia Fang,Hong Yang,Gang Wu,Weigang Li,Hongzheng Chen,Mang Wang 한국물리학회 2009 Current Applied Physics Vol.9 No.4

In order to reduce the density mismatch between TiO2 and the low dielectric medium and improve the dispersion stability of the electrophoretic particles in the low dielectric medium for electrophoretic display application, polystyrene/titanium dioxide (PS/TiO2) core–shell particles were prepared via in-situ sol–gel method by depositing TiO2 on the PS particle which was positively charged with 2-(methacryloyloxy) ehyl trimethylammonium chloride (DMC). The morphology and average particle size of PS/TiO2 core–shell particles were observed by transmission electron microscopy (TEM), scanning electron microscope (SEM) and particle size analyzer. It was found that density of PS/TiO2 core–shell particles were reduced obviously and the particles can suspend in the low dielectric medium of low density. The PS/ TiO2 core–shell particles can endure ultrasonic treatment because of the interaction between TiO2 and PS. Zeta potential and electrophoretic mobility of the fabricated core–shell particles in a low dielectric medium with charge control agent was measured to be -44.3 mV and -6.07 × 10-6 ㎠/Vs, respectively, which presents potential in electronic paper application. In order to reduce the density mismatch between TiO2 and the low dielectric medium and improve the dispersion stability of the electrophoretic particles in the low dielectric medium for electrophoretic display application, polystyrene/titanium dioxide (PS/TiO2) core–shell particles were prepared via in-situ sol–gel method by depositing TiO2 on the PS particle which was positively charged with 2-(methacryloyloxy) ehyl trimethylammonium chloride (DMC). The morphology and average particle size of PS/TiO2 core–shell particles were observed by transmission electron microscopy (TEM), scanning electron microscope (SEM) and particle size analyzer. It was found that density of PS/TiO2 core–shell particles were reduced obviously and the particles can suspend in the low dielectric medium of low density. The PS/ TiO2 core–shell particles can endure ultrasonic treatment because of the interaction between TiO2 and PS. Zeta potential and electrophoretic mobility of the fabricated core–shell particles in a low dielectric medium with charge control agent was measured to be -44.3 mV and -6.07 × 10-6 ㎠/Vs, respectively, which presents potential in electronic paper application.

Cloning and expression pattern of odorant receptor 11 in Asian honeybee drones, Apis cerana (Hymenoptera, Apidae)

Jun Feng Liu,Le Yang,Mang Li,Xu Jiang He,Zi-long Wang,Zhijiang Zeng 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.1

Odorant receptors play a crucial role in the special recognition of scent molecules in the honeybee olfaction system. The odorant receptor 11 (AmOR11) in western honeybee drones (Apis mellifera) has been demonstrated to specifically bind to 9-oxo-2-decenoic acid (9-ODA) of queens. However, little is known regarding the functions of OR11 Asian honeybee drones (Apis cerana) in the context of their mating activities. In this study, the odorant receptor 11 gene (AcOr11) from A. cerana was cloned, and its expression profiles were examined during two developmental stages (immature and sexually mature) and different physiological statuses (flying and crawling). The cDNA sequence of AcOr11 was highly similar to that of AmOr11, and encoded a membrane-coupled protein of 384 amino acids. The results of qRT-PCR indicated that AcOr11 was expressed at higher levels in drone antennae compared to brains, and the expression was significantly up-regulated in sexually mature drone brains compared to immature brains. Interestingly, AcOr11 expression in brains of mature flying drones was dramatically higher than those of mature crawling drones. To our knowledge, this study demonstrate a link between AcOr11 gene expression in the brain of honeybee drones and behavior associated with sexual maturity and mating flight.