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Vision localization apple bagging robot is researched in this paper for young apples. The key technologies of the young fruit stereoscopic images recognizing and positioning are studied in the visible light of the natural environment. Firstly, the Otsu segmentation algorithm is used to preprocess the collected young apple images. Secondly, the improved connected component labeling algorithm is used...
In this study, a brain-computer interface (BCI) paradigm based on steady-state visually evoked potentials (SSVEP) has been presented to seek the effects of the movement of the stimulus targets on classification accuracy in virtual environment, which was seldom noticed previously. Several paths including fixed, up/down, broken line, random path, and different speeds were set for searching performances'...
The aim of this study was to design a dynamically optimized steady-state visually evoked potential (SSVEP) brain–computer interface (BCI) system with enhanced performance relative to previous SSVEP BCIs in terms of the number of items selectable on the interface, accuracy, and speed. In this approach, the row/column (RC) paradigm was employed in a SSVEP speller to increase the number of items. The...
This paper presents an accurate parallel implementation of unsteady flow line integral convolution (UFLIC) for high-performance visualization of large time-varying flows. Our approach differs from previous implementations by using a novel value scattering+gathering mechanism to parallelize UFLIC and designing a pathline reuse strategy to reduce the computational cost of pathline integration. By exploiting...
Multimedia security means protecting multimedia information and information systems from unauthorized access, use, disclosure, disruption, modification, inspection, recording and destruction. The “Video Copy Detection” system is based on detecting video copies from a video sample to avoid copyright violations. Video fingerprinting is one of methods for video copy detection, including steps of video...
An effective video coding should not only remove statistical redundancy but also take into account the characteristic of human visual system. Just noticeable difference (JND) represents the maximum distortion that cannot be perceived in a suitable viewing condition. In this paper, we introduce a foveated JND model combined with visual attention model. Though moving object always attracts viewer's...
In this paper, we propose an automated, data-driven and unobtrusive framework to analyze interactional synchrony. We use this information to determine whether interpersonal synchrony can be an indicator of deceit. Our framework includes a robust facial tracking module, an effective expression recognition method, synchrony feature extraction and feature selection methods. These synchrony features are...
This paper presents a method for computing the visual odometry of ground vehicles. By mounting a downward-looking camera on the vehicle, it can recover the motion of the vehicle only by using the video input. Different from other feature based algorithms, the key technique deployed in this system is an appearance-based approach — template matching. A rotated template matching approach is used for...
As the popularity of WebVR applications rises in recent years, a great disparity exists between the huge 3D content on servers and the limited cache capacity on clients. In order to alleviate server loading, peer-to-peer (P2P)-based 3D content distribution has been proposed recently. However, given the limited cache sizes at clients, how to maintain and replace the cache content effectively becomes...
According to the problem of graph cuts matching algorithm that lots of false matches appears in weak texture area, an improved graph cuts matching algorithm for dense matching is proposed in this paper. First, corner point detection and matching are made between stereo image pairs, and false matches are eliminated by relaxation algorithm and LMeds algorithm. Secondly, triangulate partitioning of discrete...
According to the application of the planet detection, visual localization of the planet rover was studied in this paper. A corresponding robot arm plane localization simulation system for real rover robot arm based on stereo vision and virtual reality was developed. The system provided motion parameters of virtual robot arm to real arm by means of off-line teaching, which ensured the rover's safety...
By taking the Hubei Tourist Highway as a case study, the paper looks into the current situation and characteristics of the highway and the major landscape elements on the roadside(s) and puts forward the concept of landscape modules; further the paper established the framework of the module based framework for highway landscape planning concerning the characteristics and sequencing of landscape elements...
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