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It is the first step to complete edge detection of shaft part for the pose detection task. According to the characteristics of the shaft part image, an algorithm to improve contour detection is presented based on double thr eshold to extract the outline of shaft part. Freeman chain code is used to connect edge points for obtaining integrated contour information. The straightness of shaft image generatrix...
In endovascular catheter interventions, the determination of the three-dimensional (3D) catheter shape can increase navigation information and help reduce trauma. This study describes a shape determination method for a flexible interventional catheter using ultrasound scanning and a two-step particle filter without X-ray fluoroscopy. First, we propose a multi-feature, multi-template particle filter...
Objective: Discuss the relationship between ultrasonic characteristics of Hashimoto's thyroiditis benign nodules (HTBN) and serum TSH. Methods: We summarized 117 cases who were diagnosed as HTBN by thyroid fine needle aspiration according to the inclusion criteria from January 2012 to December 2013 in our department. 32 cases were misdiagnosed by ultrasound as malignant nodules. Using a random number...
Grasping has been well studied in the robotics and human subjects literature, and numerous taxonomies have been developed to capture the range of grasps employed in work settings or everyday life. But how completely do these taxonomies capture grasping actions that we see every day? We asked two subjects to monitor every action that they performed with their hands during a typical day, as well as...
Acreage of crops is an important agricultural economic information. In this paper, Using a detailed land use data, constructed sample frame. Ditch planted crops into account the direction,. In support of GIS spatial technology, the survey cost and distribution of natural land, set a reasonable standard of land area. Then under the irregular block size, spatial distribution, the relationship between...
The handover mechanism in wireless networks has been intensively investigated in the past years. The traditional solutions are to customize various protocols in different layers to provide uninterrupted communication, which is particularly important for real time traffic. In this paper, we intend to exploit silence gap, inherently existing in realtime traffic, to improve handover performance. The...
Branch modeling is one of the most important aspects in plant modeling, as branches build the structure of a plant. In this paper, we present a new method for branch modeling from two or four registered images using particle flows. Several strokes are drawn to represent branches on each image and the system produces a 3D branch model automatically. A trace analysis approach is proposed to establish...
In the paper, we present a novel approach to modeling plants from images by detecting apex features. First, an effective algorithm is proposed to extract apex features in volumetric data recovered from the images. It provides position and pose information for assigning 3D generic leaves. Then, the 3D leaf shapes are determined by an optimization based on the volume. Finally, Branches are modeled by...
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