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Many features have been proposed for person re-identification, but most of them are the combination of several different kinds of single features. And there is no research about what role the single features play and which can be fused together to improve the performance. In this paper, we explore eight single features (four colors, two textures, two gradients) and their fusions. Evaluations are conducted...
At present, the smart phones are mostly touch based, and they don't have an input hardware (keyboard) associated with them. Also, the software keyboard present in these smart devices, are very small as compared to desktop/laptop. This results in slow typing and also, causing inconvenience for the disabled people. In the smart devices (mobile, tablets, TV etc.), a hardware keyboard is missing. There...
Human action recognition has been an active research topic for its wide application. Most researches focus on the recognition based on one single modality sensor. In this paper, we present a novel approach for human action recognition, which is based on fusing triaxial acceleration signals and depth maps. We extract Fast Fourier Transform (FFT) coefficients from acceleration signals and Histograms...
This paper presents a simple analogy to track red green and blue (RGB) color markers in real time through charged coupled device (CCD) calibrated by using direct linear transformation (DLT) method. A graphical user interface (GUI) application is designed in Matlab 2015a, to display real time actual measurements to ease detection of objects for grabbing through a robot gripper and place it at desired...
The sampled filter array sensor is widely used in image capturing devices. For example, the color filter array image sensor is used in digital still cameras, mobile phones, etc. Traditionally, sampled RGB images are first interpolated to produce full-resolution RGB images and then converted to the Yuv format. These Yuv images or videos are encoded. In this paper, we propose a directing encoding method,...
In this paper we introduce a novel method to detect and alarm pedestrian fall action in video surveillance by using frame difference method and pedestrians marker frame. Firstly, we used the fixed camera to capture video image information, and applied the morphological erosion and dilation method to reduce the noises. Then combined the frame difference method and the background difference method to...
A view synthesis problem is to generate a virtual view based on the given one or multiple views and their associated depth maps. We adopt the depth image based rendering (DIBR) approach in this paper for synthesizing the new views. No explicit 3D modeling is involved. Another component of this study is the popular commodity RGB-D (color plus depth) cameras. The color and depth images captured by a...
RGBD cameras are used in many fields, such as monitoring, robot navigation and assistive solutions for visually impaired people. The advance in technology led to the development of cheap and easy to use cameras, such as Kinect, that gained a lot of popularity. One of the technologies that allow the capturing of depth maps, the D component in RGBD sequences, is structured light. The main drawback of...
A 3D motion detection method based on RGB-D data and scene flow clustering is proposed in this paper. The 3D extension of the optical flow called scene flow which describes the 3D motion of every point in a scene between two consecutive frames. Firstly, we estimate the scene flow using color maps and the aligned depth maps in two consecutive frames, then extract the feature vector of each point from...
Joint calibration of the laser range finder (LRF) and the camera is the foundation of their information fusion and it is also the key step in visual measurement. In this paper, a joint calibration method based on the feature points matching of a grid calibration target is proposed. Firstly, the camera and the LRF internal parameters are calibrated. Then the cloud point data which LRF output is dealt...
Hand detection is widely used for recognizing hand gesture which is a primary step for sign language recognition. With larger quantities of sensors, it can provide real-time depth measurements such as Kinect sensor and help researchers find the hand position in the scene without the environment interference such as skin color background. The hand segmentation is based on depth image which is particular...
In this paper, a fusing approach of a 3D sensor and a camera are used to improve the reliability of pedestrian detection. The proposed pedestrian detecting system adopts DBSCAN to cluster 3D points and projects the candidate clusters onto images as region of interest (ROI). Those ROIs are detected by HOG (histograms of oriented gradients) pedestrian detector. Because the DBSCAN groups together 3D...
This article deals with operation and maintenance of lighting in substation of transmission system. In the first part, indoor work places lighting in substation building are described. The second part is aimed at new outdoor work places lighting — fence lighting, road lighting and lighting of work places. New substation lighting system can be monitored and diagnosed during its operations. Condition...
The recent literature proposes the smartphone's camera to evaluate the arterial blood oxygenation (SpO2%) with the characteristic of friendly and ubiquitous measurement instrument. Some issues remain open, making difficult the compensation of artefacts causing error in the estimation of the photoplethysmogram signal (PPG) and not guarantying that the measurement of SpO2% is correctly executed. In...
Recently, optical sensors have become a standard item in modern cars, raising questions with respect to the necessary testing under various ambient effects. In order to achieve a high test coverage of vision-based surround sensing systems, a lot of different environmental conditions need to be tested. Unfortunately, it is by far too time-consuming to build test sets of all relevant environmental conditions...
In recent years, depth sensing systems have gained popularity and have begun to appear on the consumer market. Of these systems, PMD-based Time-of-Flight cameras are the smallest available and will soon be integrated into mobile devices such as smart phones and tablets. Like all other available depth sensing systems, PMD-based Time-of-Flight cameras do not produce perfect depth data. Because of the...
Perceiving color in water medium is always challenging due to the dense non-uniform attenuation and scattering of light across the visible spectrum. This paper presents a color restoration method for underwater objects based on multispectral images. To begin with, underwater multispectral images are obtained and restored with the influence of attenuation and scattering being eliminated by an in-suit...
Recent advancements in depth imaging sensors technologies have resulted in effective and inexpensive depth cameras which are actively used for 3D motion capture, surveillance systems human tracking, monitoring, user recognition systems and activity recognition. Tremendous developments have been carried out in communication and networking for the design of Smart Ward Systems used in Health Monitoring...
Visible Light Positioning (VLP) is an exciting new approach but has to overcome considerable challenges before it becomes practical. In particular, the line-of-sight requirement which imports the constraint on the working condition of VLP and can not be solved by the VLP itself. This paper develops techniques to allow VLP to be augmented with traditional WI-FI approach by leveraging the WI-FI enabled...
Background: According to several recent research results [1]-[4], obesity can increase the risk of many diseases such as diabetes, chronic kidney disease, metabolic disease, cardiovascular disease, etc. To prevent and treat the obesity efficiently and effectively, diet monitoring is an important factor. Purpose: Manual self-monitoring techniques for diet suffer from drawbacks such as low adherence,...
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