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We present a novel plane extraction algorithm based on coplanar line pairs for poorly textured scenes. Coplanar line pairs are extracted from intersecting line pairs and matched between two views, and their correspondences act as geometric primitives for 3D planar patch extraction. Each correspondence generates a plane hypothesis by estimating planar homography using the compatibility constraint with...
In this paper, a new algorithm for encoding spectral envelope in G.729.1 for VoIP is proposed. In the TDAC part of G.729.1, the spectral envelope and MDCT coefficients extracted in the weighted CELP coding error (lower-band) and the higher-band input signal are encoded. In order to reduce allocation bits for spectral envelope coding, a new algorithm using sub-band correlation between adjacent frames...
Since its recent successful isolation, graphene has attracted an enormous amount of scientific interest due to its exceptional physical properties. Graphene incorporation can improve electrical and mechanical properties of polymers including polyethylene (PE). However, the hydrophobic nature and low polarity of PE have made effective dispersion of nano-fillers difficult without compatibilization....
The authors present a robust face recognition system for large-scale data sets taken under uncontrolled illumination variations. The proposed face recognition system consists of a novel illumination-insensitive preprocessing method, a hybrid Fourier-based facial feature extraction, and a score fusion scheme. First, in the preprocessing stage, a face image is transformed into an illumination-insensitive...
This paper presents a novel method of wide-baseline image matching based on the intersection context of coplanar line pairs especially designed for dealing with poorly textured and/or non-planar structured scenes. The line matching in widely separated views is challenging because of large perspective distortion and the violation of the planarity assumption in local regions. To overcome the large perspective...
This paper discusses the problem of handling active RFID tags in the RFID middleware. Application Level Events specification provides standard APIs for the RFID middleware. The basic role of the specification is the filtering and collection for the RFID data. However, this does not cope with the active tags because active tags are battery-powered. Indiscreet requests to the active tags will exhaust...
This paper presents a novel line matching method based on the intersection context of coplanar line pairs especially working in poorly textured indoor scenes. To overcome the matching ambiguity of single line segments, intersecting line pairs in 2D images are utilized for line matching. Coplanarity of the intersecting line pairs and their corresponding intersection context discriminate true intersecting...
In this paper, we proposed a calibration method for a structured light system composed of a wide-angle line laser and a camera using a planar object. Instead of directly calibrating the camera with a planar object, we separated the radial distortion estimation from the camera calibration step to improve accuracy. Firstly, we corrected the lens radial distortion and then computed the camera's intrinsic...
In this paper, we propose a novel method using gender information for achieving better performances of face recognition systems. Gender is one of the important factors for recognizing appearance of human faces and there are many studies on gender classifications such. However, the gender information is not actively applied in vision-based face recognition tasks, because we cannot find out human identity...
Tagging is one of the most popular services in Web 2.0. As a special form of tagging, social tagging is done collaboratively by many users, which forms a so-called folksonomy. As tagging has become widespread on the Web, the tag vocabulary is now very informal, uncontrolled, and personalized. For this reason, many tags are unfamiliar and ambiguous to users so that they fail to understand the meaning...
Polycarbonate composites reinforced with graphite and functionalized graphene sheets (FGS) were produced using melt compounding. Composite samples with different degrees of graphite orientation were processed via injection, compression molding and long-term annealing. Electron microscopy and X-ray scattering revealed that FGS was nearly exfoliated. However, graphite remained multi-layer even after...
Tagging is one of the most popular services in Web 2.0 and folksonomy is a representation of collaborative tagging. Tag cloud has been the one and only visualization of the folksonomy. The tag cloud, however, provides no information about the relations between tags. In this paper, targeting del.icio.us tag data, we propose a technique, FolksoViz, for automatically deriving semantic relations between...
Recently, the number of articles, blog posts, photos and videos on the Web is dramatically increasing because of the increase of Internet usage. In this situation, the Web search is the most important thing in the Web. When we search, we can use text information from articles or blog posts. In the case of photos and videos, we can only use a title. If there are tags - significant keywords of that...
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