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To explore the genus Bougainvilleaclassification criteria, comparative analysis of 15 morphological traits collected 18 varieties of Bougainvillea, in order to provide a reference for the promotion of Bougainvillea cultivation, breeding and classification, identification and other research. Q-type clustering results showed that 18Bougainvillea varieties can be divided into 3 categories, including...
Back deformity studies require marks or labels which are attached on patient's body in order to measure and evaluate the level of severity. Manually marking of anatomical landmarks on two dimensional (2D) image can reduce time-consuming in traditional process but there is difficulty in 2D-visually locating the anatomical landmarks in some patients. Currently, 3D scanners are inexpensive and become...
Spread-spectrum is a technique which is widely used in telecommunication and radio communication. For clock signal, this technique makes the clock signal energy distributed on the relevant frequency range rather than on the single frequency point. Thus the Electro-Magnetic-Interference (EMI) of clock is reduced. Since the clock signal is modulated by another signal, resulting in its frequency is changing,...
This paper proposes a methodology for 3D ear recognition using spin images and removing false mapped features using geometric surface properties of 3D shapes. Many Feature detection techniques works well with different 3D objects for recognition but not well with ear data of similar shapes. Since, ear data of the different subjects varies with unique features but fundamentally of similar shape. Detected...
In this paper we propose a new density clustering algorithm under the assumption that clusters are high density regions in the feature space separated by relatively low density ones. There are two novelties for the proposed algorithm: one is to model any dimensional clustering into one dimensional analysis of density distribution along paths through most compact regions between representative points,...
This paper deals with an integrated optimal tuning of a two degree of freedom (2DOF) PI controller extended by an nth order binomial low pass filter for a measurement noise attenuation. It analyses and evaluates two modifications of the triple real dominant pole tuning method and discusses possibility of the simplified tuning modification that may be easily applied to filtered PI controller tuning...
Non-photorealistic rendering technique can be powerful approach to enhance both visual coherence and immersion in immersive media. Especially, painterly rendering is one of Non- photorealistic rendering that seems similar to paintings using 2D or 3D model data and artist's painting is affected by factors such as how he observes objects. In here, we can notice from paintings that painters observe the...
Cluster validity index Is used for estimating the quality of partitions to a dataset by clustering algorithms, and finding the optimal number of clusters to be partitioned. In this paper, we propose a new validity index, which is based on a dispersion measure and an overlap measure. The dispersion measure estimates the overall data density of the clusters in the dataset; whereas the overlap measure...
In this paper, we present an efficient improvement of our colour shape descriptor, QDHMs, which is based on harmonics defined on the unit disc. A new sampling of the unit disc, using the Healpix (hierarchical equal area isolatitude pixelation) tool, is established. The use of Healpix is justified by its geometric properties that insure a fast analysis of big amounts of data. Healpix was initially...
In this preliminary study we aim to extract muscle synergies in spiral tracking task when performed with the non-dominant hand, and investigate the effect of training on muscle synergies. Three young subjects who were university students (all Females, 21±1 years old, right-handed) volunteered to participate in this study. The subjects were healthy with no history of neuromuscular disease. Each subject...
We present a scalable system for sketch-based image retrieval (SBIR), extending the state of the art Gradient Field HoG (GF-HoG) retrieval framework through two technical contributions. First, we extend GF-HoG to enable colorshape retrieval and comprehensively evaluate several earlyand late-fusion approaches for integrating the modality of color, considering both the accuracy and speed of sketch retrieval...
The scientific and reasonable evaluation of ecological pattern and environmental status, as well as the launch of nature conservation and ecological protection and management is of great significance. In this paper, Landsat-TM image data of 2009 and 2013 was selected with Geyucheng as the study area, and analysis is carried out for changes in the landscape of the study area with RS and GIS technology...
3D facial landmarks play a significant role in many 3D facial studies. Due to the complex geometry of high resolution 3D human face, landmark detection remains to be a challenge problem. This paper proposes a novel method to detect landmarks automatically for high resolution 3D faces without learning or training, solely using geometric information. For high resolution 3D faces, geodesic remeshing...
This paper presents an approach to derive a novel 3D signature based on the micro-geometry of paper surfaces so as to uniquely characterise and classify different paper substrates. This procedure is extremely important to confront different conducts of tampering valuable documents. We use a 4-light source photometric stereo (PS) method to recover dense 3D geometry of paper surfaces captured using...
The paper presents results of the observations on behavior and properties of the control quality that is met in real industrial practice. The analysis is based on data from several hundreds of control loops operating in different process industries located in several sites all over the world. Practice shows that theoretical assumption about Gaussian properties is hardly met. The author suggest novel...
The paper presents a sketch-based image retrieval algorithm. One of the main challenges in sketch-based image retrieval (SBIR) is to measure the similarity between a sketch and an image in contour with high precision. To tackle this problem, we divided the contour of image into two types: the first is global contour, suggesting that we can use it to reduce the similarity between the images with complex...
In this paper we present an automatic volumetric liver localization method as an approach for liver segmentation. In the proposed method the aim is to localise a mean shape model of the liver in the target CT scan. The framework consists of three main steps: shape model construction, low level processing and shape model registration. We evaluated our method on the MICCAI 2007 liver segmentation challenge...
In this paper, a fast reactive obstacle avoidance approach for omnidirectional driving is presented. The method is based on the dynamic window approach, but uses a cuboid instead of a window to limit the 3-dimensional search space accordingly to the dynamic constraints of the robot. Besides the kinematics and dynamics, the presented approach also considers the shape of a robot. To cope with the effort...
In clinics, customized archwires are demanded for lingual orthodontic treatment. However, only very experienced orthodontists can handle the manual appliance preparation. This pattern not only occupies lots of the orthodontist's labor time, but also can not ensure the accuracy of the appliances. Therefore, a robotic system was developed for automatic and accurate orthodontic archwire bending in our...
Left ventricular functional geometry (LV FG) refers to the dynamical change in the ventricular shape during contraction and relaxation. It has been shown that LV FG significantly contributes to the regulation of contractility and cardiac pump function in health and disease. The aim of our work is to evaluate the LV FG in patients with common myocardial diseases. Here we have evaluated a control group...
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