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For secure data transmission over internet, it is important to transfer data in high security and high confidentiality, information security is the most important issue of data communication in networks and internet. To secure transferred information from intruders, it is important to convert the information into cryptic format. Different methods used to ensure data security and confidentiality during...
From thousands of years back our predecessors have invented several ways of passing information in hidden form with other objects like papyrus scroll, cryptex etc. As decades crossed through earth's vein we are getting matured and invented several steganographic systems for message passing. The availability of internet in every corner of the universe forced the user of steganographic systems to invent...
We have proposed a panoramic video synthesis method that uses a layered probability mapping method to generate high-quality three-dimensional (3D) images. The method's algorithm required a certain amount of synthesis calculation for estimating the presence of objects within an overall scene.
Secured data transmission over computer networks can be achieved through steganography. In specific, Image Steganography entails the opportunity of hide any secret information into images. This paper presents the implementation of two image steganographic techniques in MATLAB. The first is a filter method to embed text information into image and new methods have been demonstrated to increase the information...
The proliferation of wireless technology, mobile computing, and increasingly sophisticated video codecs have fueled the sharp increase in demand for user-centric applications involving wireless video streaming. Consequently, it is becoming progressively more important to ensure that wirelessly transmitted video signals are delivered with optimal perceptual quality to the end-user. This is in contrast...
This paper presents the design of a high-performance processor used for head-mounted display (HMD) applications targeting stereo video processing. The proposed hardware architecture of the video processor consists of three major parts: an adaptive 3-dimensional (3D) video decoder to accurately decoding the stereo composite video base band signal (CVBS) source, a video source separation module to generate...
Consecutive corrupted MBs or slice errors are commonly seen in modern video transmission systems. Temporal error concealment is an effective approach to reduce the impact of errors. Conventional temporal error concealment techniques recover slice errors on a MB basis. We propose a new novel temporal scheme for slice error concealment based on a size-adaptive region basis. Size-adaptive region boundary...
Human detection in video streams is an important task in many applications including video surveillance. Surprisingly, only few papers have been devoted to this topic.
Depth Image Based Rendering (DIBR) is a technique to render virtual views from the video-plus-depth 3D scene representation. A common phenomenon in DIBR are disocclusions, i.e., unfilled areas that occur in the rendered views. The performance of disocclusion filling algorithms is usually only tested in terms of their ability of finding plausible fillings frame-by-frame. Time-consistency, however,...
Video fire detection system which uses a spatio-temporal covariance matrix of video data is proposed. This system divides the video into spatio-temporal blocks and computes covariance features extracted from these blocks to detect fire. Feature vectors taking advantage of both the spatial and the temporal characteristics of flame colored regions are classified using an SVM classifier which is trained...
In this paper, a no reference bit stream model for quality assessment of SD and HD H.264/AVC video sequences based on packet loss visibility is proposed. The method considers the impact of network impairments on human perception and uses the visibility of packet losses to predict objective scores. Also, a new subjective experiment has been designed to provide insight into the perceptual effect of...
Subpixel-based down-sampling is a method that can potentially improve the apparent resolution of a down-scaled image by controlling individual subpixels rather than pixels. However, the increased luminance resolution often comes at the price of chrominance distortion. A major challenge is to suppress color fringing artifacts while maintaining sharpness. In [1], we proposed a novel human visual quality...
With the introduction of IP/Ethernet networks in automobiles, video compression becomes mandatory for efficient video transfer. Lossy image and video compression standards, such as JPEG and H.264/AVC, achieve high compression efficiency, but also introduce irreversible modification to the video data. On the one hand, this can lead to perceivable image degradation, and on the other hand, affect the...
In the present work, automatic corner detection in soccer games based on image features (e.g., object-based features) has been studied. For this purpose, a framework has been proposed that consists of five steps. This paper mainly focuses on the first three steps and specially ball detection step. Ball position on the field plays an important role in determining which event has occurred in the game...
MPEG is one of the popular standards in image compression. Blocking is the most annoying artifact of encoding/decoding process. In this paper a post-processing deblocking algorithm for MPEG video stream is proposed. This method is based on the correlation of local pixels in block boundary region. It takes two 4×4 adjacent small blocks on both sides of a block boundary as a local processing region...
Video extrapolation is the task of extending a video beyond its original field of view. Extrapolating video in a manner that is consistent with the original video and visually pleasing is difficult. In this work we aim at very wide video extrapolation which increases the complexity of the task. Some video extrapolation methods simplify the task by using a rough color extrapolation. A recent approach...
Embedded consumer electronics like video processing systems require large storage capacity and high bandwidth memory access. Also, those systems are built from heterogeneous processing units, designed specifically to perform dedicated tasks in order to maximize the processing power. A single off-chip memory is shared between the processing units to reduce power and save costs. The external memory...
In this paper, we present an approach that uses information about the FPGA architecture to achieve optimized allocation of embedded memory in real-time video processing system. A cost function defined in terms of required memory sizes, available block- and distributed-RAM resources is used to motivate the allocation decision. This work is a high-level exploration that generates VHDL RTL modules and...
In this work we present a real time video processing framework, which can handle high data throughput rates. Contrary to common digital hardware realizations which use several image line long shift register pipelines for direct calculation of 2D neighborhood operations, we suggest an efficient cyclic image line storage structure by using dual port block RAM buffers, which are available in recent FPGAs...
Time lapse technique is a cinematography technique whereby each film frame is captured at a rate much slower than it will be played back. When replayed at normal speed, time appears to be moving faster and thus lapsing. Processes that would normally appear stable to the human eye, such as the motion of the sun and stars in the sky, blooming flowers, plant growing, rotting fruits etc become very pronounced...
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