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The resolution of scanning ultrasonic systems is limited to the wavelength used and the focus size. Common methods for determination of object sizes close to or even smaller than wavelength require knowledge of the object geometry and use absolute amplitude information only. We present new approaches for determining shape and size of small objects by additional evaluation of sound field effects like...
The vertex and edge effect caused by polygonal representation of a virtual object can result in energy leak and make the system unstable. In this paper, we focuses on how to eliminate the vertex and edge effect by developing new haptic rendering algorithm when a probe moves across the vertices. We propose a new method to eliminate it by using a vector median filter weighted with shape measure. This...
Shape recognition plays an important role in machine vision applications. The effective recognition algorithm should be less complicated and more accurate. In this paper, a structural descriptor for shape recognition is presented which has less complexity and more accuracy comparing with existing algorithms. Obviously, the boundary of shape is an important property in shape representation and description...
In Kansei Engineering, sample shapes have been treated as categorical variables in nominal scale. In this paper, we describe the method for focusing on product shapes concerning customers' Kansei, to avoid confusing effects on Kansei caused by other properties such as sizes, orientations, colors, textures, and so on. We standardized the shapes of sample products and made them into statistical values...
Belonging to the dynamic and real-time metrology, the key on 3D shape measurement of moving object is one-shot technology including one image acquisition, real-time processing and displaying. According to different speeds of motion, a few structured light methods such as spatial encoding, FTP, phase shifting method and spacetime stereo are introduced and summarized in the form of principle, development,...
The pressure distribution within pneumatic strip shape measuring roll directly affected its specifications. It presented a finite difference equation of the air film regiona film corresponding to an orifice. An analysis and simulation on film pressure field and the bearing capacity were complted with the principle of Reynolds equation. The results showed that the pressure in measuring holes was smooth;...
The sensor monitoring data coming from complex industry environment is the main real-time dependence for people working in the manufacture monitoring center to know the field operation condition. Using the data mining techniques to discover the regularity knowledge from the sensor monitoring database is very important for the supervisors to identify the reason causing the exceptional fluctuation automatically...
Shape matching is a very critical problem in computer vision, and many smart features have been designed in recent literature for improving the similarity measure between pairs of shapes, and most of them consider either distribution of the sample contour points, or convexity/concavity property of the contour. In this paper, we design a novel shape feature to capture the Co-Occurrence Pattern (COP)...
A composite radio reflector (the MkII) was molded at the Dominion Radio Astrophysical Observatory (DRAO) in 2008. The MkII was built as a demonstrator for the International Square Kilometre Array (SKA). Since 2008, the MkII has been used to test a prototype Phased Array Feed (PHAD). This PHAD demonstrator puts a substantial load on the structure. The MkII telescope has also been used to investigate...
This paper presents a novel representation and matching method for deformable shapes. The proposed approach finds most expressive segments of a deformable shape category called similar and discriminative parts, which is able to distinguish the learned shape class from other groups. And it leads a learning strategy together with a matching algorithm. Then we test our method with MPEG-7 data set.
The modal experiment analysis of large structure is effective method of structure health evaluation in new century. Nowadays, the modal experiment data of transmitter tower is few, and moreover the modal experiment of whole transmission tower is nearly blank. This paper study and provide the modal experiment method of whole transmission tower which be stationary reference point and mobile measure...
Based on the early basis research work such as feature size extraction of young male's digital images, somatotype and building of girth size prediction model, non-contact young male body measurement system is mixed preparation by using object-oriented VB6.0, MATLAB and database ACCESS2003. Measurement objects in the system contain young male and female body and ultimately 40 body size data can be...
A method for structural damage identification using residual force vector and mode shape expansion is presented in this paper. To deal with the incompleteness of measured modal data, a mode shape expansion method is first introduced to match with all degrees of freedom of the finite element model under consideration. And then, the residual force vector is employed to locate the damage position and...
TSR (Traffic sign recognition) is an important research field in ITS (Intelligent traffic system), which is being paid more and more attention for realizing drivers assisting system and automated navigation etc. Author proposed a new method to detect traffic signs in outdoor scene. The method is divided into 2 step. Firstly, Two-way integration method including both methods drived by task and methods...
In this study, in order to investigate the wave-induced buoyancy effects, experimental studies were conducted on pontoon-type floating structures. A series of small-scale tests with various wave cases were performed on the pontoon models. A total of four small-scale pontoon models with different lateral shapes and bottom details were fabricated and tested under the five different wave cases. Six hydraulic...
Shape representation plays a vital role in any shape optimization exercise. The ability to identify a shape with good performance is largely dependent on the underlying shape representation scheme. In this paper, a novel shape representation scheme is presented based on B-splines, wherein the control points representing the shape are repaired and subsequently evolved within the framework of a memetic...
The shape of the precipitation particle is not only an important issue of the precipitation's study, but also the basis of precipitation recognition. In order to obtain the shape information of different precipitation particle, this article simply introduced the basic principle of optical image measurement, and the high-speed linear CCD measurement of precipitation. The image of a rainfall particle...
Tortuosity is one of the first manifestations of many retinal diseases such as those due to retinopathy of prematurity (ROP), hypertension, stroke, diabetes and cardiovascular diseases. An automatic evaluation and quantification of retinal vessel tortuosity would help in the early detection of such retinopathies and other systemic diseases. This paper proposes a new approach based on principal component...
Content-Based Image Retrieval (CBIR) systems have been developed to support the image retrieval based on image properties, such as color, shape and texture. In this paper, we are concerned with shape-based image retrieval. In this context, we propose a method to describe shapes based on salience points. The proposed descriptor utilizes a salience detector which is robust to noise, and an elastic matching...
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