The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Real-time object tracking is recently becoming more and more important in the field of video analysis and processing. Applications like traffic-control, user-computer interaction, online video processing and production and video surveillance need reliable and economically affordable video tracking tools. This paper presents a new method for object tracking with improved efficiency by reducing the...
Visualization of flow fields with geometric primitives is often challenging due to occlusion that is inevitably introduced by 3D streamlines. In this paper, we present a novel view-dependent algorithm that can minimize occlusion and reveal important flow features for three dimensional flow fields. To analyze regions of higher importance, we utilize Shannon's entropy as a measure of vector complexity...
Processing Real-Time image sequence is now possible because of advancement of technological developments in digital signal processing, wide-band communication, and high-performance VLSI. With the developments in video technology, the surveillance system can be built with some low cost gadget such as the web-camera. In this modern life with increasing number of crime rate, people in society need for...
Background subtraction is a technique for detecting moving objects in video frames. A simple BS process involves building a model of the background and extracting regions of the foreground (moving objects) with the assumptions that the camera remains stationary and there exist no movements in the background. Video object extraction is a critical task in multimedia analysis and editing. Normally, the...
A compact video processing system which deals with video detecting, compressing and recording is designed on DSP. And in order to find a balance among hardware resources (prime cost), processing speed, detecting performance, system stability and system reliability, further algorithm and processing mechanism optimizations are proposed. This system does automatic surveillance of an unattended area installed...
It has long been recognised that a wireless communication system can be more efficient if link-layer parameters such as modulation order, symbol rate and packet size, are (adaptively) optimised. A common optimising criterion is to maximise spectral efficiency (bits per second per Hertz (bps/Hertz)) subject to a very low bit-error constraint. But a packet-oriented criterion for link adaptation seems...
Digital video contents now become easily available through Internet and various medium. Easy availability made digital video more popular than analog media. And it attains a sharp attention regarding its ownership. The ownership integrity can be easily violated using different video editing software. In this regard we are proposing a chip level framework in accordance with our already proposed LSB...
There is a number of automated shot-change detection methods for indexing a video sequence to facilitate browsing and retrieval have been proposed in recent years. In this paper, shot change (hard cut) detection that is based on "inter-frame difference" and its comparison with a threshold are discussed. The summery of changing video threshold on hard cut detection is done. A threshold value...
This article proposes a reversible high-capacity watermarking algorithm for the H.264/AVC video standard. The technique applies the concept of Differential Expansion (DE) on the pixel values of the IPCM macroblocks generated by the H.264/AVC encoder. To ensure a high watermark payload, the algorithm performs the embedding in multiple layers. Initial experimental results showed that the technique not...
Thailand is an agricultural country, where is located in Southeast Asia. We can produce various kinds of food in not only a good quality but also a huge quantity. One problem of both quality and quantity control of our food products are the food harmful pests such as bird, ant, weevil, aphid, grasshopper etc. Therefore, this project intends to develop the computer system that can be chased birds from...
Modern FPGAs enable complete system designs that include processors, interconnect systems, memory subsystems and a number of application functions that are implemented using High-Level Synthesis tools.
Most of the literature on image filtering using FPGAs focuses on the normal case when the window is completely within the image. The exception - when the window is partly off the edge of the image - is rarely considered. If not managed appropriately, handling these exceptions can take up more resources than the main operation. Efficient techniques are presented that manage the image borders by reusing...
Detecting static objects in video sequences has a high relevance in many surveillance scenarios like airports and railwaystations. In this paper we propose a system for the detection of static objects in crowded scenes that, based on the detection of two background models learning at different rates, classifies pixels with the help of a finite-state machine. The background is modelled by two mixtures...
We present a mobile augmented reality (AR) translation system, using a smartphone's camera and touchscreen, that requires the user to simply tap on the word of interest once in order to produce a translation, presented as an AR overlay. The translation seamlessly replaces the original text in the live camera stream, matching background and foreground colors estimated from the source images. For this...
Guarding against channel errors in wireless networks has been a challenging research problem, specially when transmitting time-constrained contents, like streaming video or image. Source diversity in the form of Multiple Description Coding (MDC) has been studied for guarding against wireless channel errors. In MDC, an image is broken into several equally important descriptions which can be sent over...
The video quality of the conventional single description (streaming) coding (SDC) is vulnerable to transmission errors. Once a video frame is lost, it is likely to cause error propagation to the subsequent received frames, and this increases the difficulty of whole-frame error concealment by its preceding and/or succeeding reference frames. The temporal Multiple Description Coding (T-MDC) is more...
Influenced by the widespread adoption of HDTV consumer imaging devices have begun to feature full HD (high density) video capture. With this high-resolution capability, small imperfections in human faces are captured with full HD video. When used for portrait imaging, the resulting video is frequently unsatisfactory to the user. Manufacturers of imaging devices require practical, real-time solutions...
In this paper we present a real-time system for projection of image/video content on a moving objects (human) regions of interest (ROIs) using projector based on object motion detection and tracking using optical camera. We present techniques for correlation camera and projector I/O image/video stream designed to successfully combat different coordinate spaces and we discuss their performance. Dynamic...
Due to fast growth of wireless mobile networks, video transmission over wireless media has been widely studied. As wireless networks are error prone, there is a high possibility of loss in sent packets. Since time limitations in real-time video applications should be met, the delay-related to resending packets — is not acceptable and the error should to be concealed at receiver side. With respect...
Action recognition had become prosperous in development and been broadly applied in several sectors. From homeland security, personal property, home caring, even the smart environment and the motion-sensing games, are in its territories. This paper analyses the algorithm of action recognition for embedded system and finds that there are many blocks can use the parallel execution to compute more efficiently...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.