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All multimedia devices now incorporate video CODECs that comply with international video coding standards such as H.264 / MPEG4-AVC and the new High Efficiency Video Coding Standard (HEVC) otherwise known as H.265. Although the standard CODECs have been designed to include algorithms with optimal efficiency, large number of coding parameters that can be used to fine tune their operation, within known...
Hadoop framework has recently been adapted for use by the video analytics community for intensive, distributed video processing, storage. However, the challenge is to estimate the required amount of resources to be used in such an environment to fulfil the requirements of a user with requirements constraints. Therefore, it is important to understand how to model the performance of a Hadoop based implementation...
Multi exposure image fusion is a well-known approach adopted to create High Dynamic Range (HDR) images and emulate the Human Visual System (HVS) using Standard Dynamic Range (SDR) cameras. The main limitation of current multi-exposure image fusion techniques is their inability to compensate for moving objects in a scene and camera shake. Previous attempts to solve camera shake have been able to accurately...
This research presents a novel colour management system within an Image Signal Processor pipeline that encompasses the colour constancy problem and reproduces perceptually pleasing colours in the final image produced by an ISP. The proposed colour management system includes a new machine learning based automatic white balancing algorithm, an intelligent colour matrix balancing method for achieving...
We propose an efficient real-time automatic license plate recognition (ALPR) framework, particularly designed to work on CCTV video footage obtained from cameras that are not dedicated to the use in ALPR. At present, in license plate detection, tracking and recognition are reasonably well-tackled problems with many successful commercial solutions being available. However, the existing ALPR algorithms...
Taking sharp and high-resolution images usually relies on high quality camera systems. In this paper, we present an approach to correct chromatic aberrations distortions on images caused by imperfect optics. The proposed system relies on a calibration step where the distortion produced by the lens is estimated, followed by a second stage where the image is enhanced. The proposed system works in RAW...
In this paper we propose an enhanced approach to automatic baggage detection in CCTV video footage that addresses some of the shortcomings of state-of-the-art algorithms and a novel approach to the subsequent recognition of their type. The proposed approach consists of standard steps used in baggage detection, namely, the estimation of moving direction of humans carrying baggage and the alignment...
This paper presents a system that improves the viewing quality of video broadcast on current commercially available mobile display devices. Existing coding standards are used to transmit High Dynamic Range video and ambient lighting data is used to enhance the image displayed. The system remains fully backward compatible.
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...
This paper proposes a reversible watermarking technique that utilizes the IPCM macroblocks generated by the H.264/AVC encoder. The technique applies the concept of Differential Expansion (DE) to the pixels of the luminance and the chrominance components within the IPCM macroblocks of the P-frames. The performance of the proposed algorithm was tested for a number of video sequences and compared to...
The proposed work describes a system that can be used to detect and decode multiple Two-Dimensional (2D) barcodes (i.e. Datamatrix). The proposed system is capable of detecting and decoding of barcodes covered by polyethylene foiling in moving images. The foiling causes reflection on the captured images and hence provides challenges to detection/decoding. Similarly the proposed system addresses the...
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