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In this paper, we present a novel re-texturing approach using intrinsic video. Our approach begins with indicating the regions of interests by contour-aware layer segmentation. Then, the intrinsic video (including reflectance and illumination components) within the segmented region is recovered by our weighted energy optimization. After that, we compute the normals for the re-textured region, and...
This paper introduces the topic of appearance-based re-identification of people in video. This work is based on colour information of people's clothing. Most of the work described in the literature uses full body histogram. This paper evaluates the histogram method and describes ways of including spatial colour information. The paper proposes a colour-based appearance descriptor called Colour Context...
This paper presents a method that combines colour and motion information to track pedestrians in video sequences captured by a fixed camera. Pedestrians are firstly detected using the human detector proposed by Dalal and Triggs which involves computing the histogram of oriented gradients descriptors and classification using a linear support vector machine. For the colour-based model, we extract a...
The ability to measure metric information from videos is an essential functionality in security software packages that populate databases with human morphometric and gait descriptors. The configuration of such security systems often involves calibrating the cameras in the surveillance network. For this purpose, markers are placed on the ground in the vicinity of each camera location in order to compute...
We define a “generic” non-rigid face tracker as any system that exhibits robustness to changes in illumination, expression and viewpoint during the tracking of facial land-marks in a video sequence. A popular approach to the problem is to detect/track an ensemble of local features over time whilst enforcing they conform to a global non-rigid shape prior. In general these approaches employ a strategy...
In this paper, a direction-oriented covariance based deinterlacing method is presented. First, the local direction of edge is determined by modified edge-based line average (MELA) method. Then, based on the geometric duality, the optimal interpolation coefficients for the neighbor pixels of corresponding direction are estimated using the Wiener filtering. Experimental results prove that the proposed...
Fast and accurate foreground detection in video sequences is the first step in many computer vision applications. In this paper, we propose a new method for background modeling that operates in color and gray spaces and that manages the entropy information to obtain the pixel state card. Our method is recursive and does not require a training period to handle various problems when classify pixels...
This paper focuses on the way for no-reference objective video quality assessment based on de-compressed domain of mobile multimedia broadcasting, it analysis the blocking artifacts and blurring algorithm of damaged image with different test sequences at different compression rates, and uses the linear-weighted methods to estimate the value of objective evaluation of video quality. The experiment's...
Detailed research is conducted on video texture for 3D movie play application and current research situation, problem and challenge in the world are analyzed in this paper. Then an effective solution is presented. Direct Show is used to manage the video data while Direct 3D serves as graphic rendering API. This paper extracts the parallel computing module from the fixed rendering pipeline and takes...
Object tracking in video sequences has been extensively studied in computer vision. Although promising results have been achieved, often the proposed solutions are tailored for particular objects, structured to specific conditions or constrained by tight guidelines. In real cases it is difficult to recognize these situations automatically because a large number of parameters must be tuned. Factors...
The adaptive weighting based on the intensity variations of the neighbor pixels and the distance between the neighbor pixels and a pixel to be interpolated is proposed for the edge-based deinterlacing method. The local edge direction is first determined by the modified edge-based line averaging (MELA) method. Then, according to the local edge direction, the inverse distance and intensity variation...
Shopping carts have traditionally been used as a tool provided to the customers in retail stores to carry items from the shelf to checkout stations. These days shopping carts can also be used as a security checkpoint to prevent store losses. All the items collected in a shopping cart are supposed to be unloaded at the checkout station to be scanned and included in the bill. Any items left in the cart...
In the process of traffic video segmentation, the moving shadows have always been wrongly detected as foreground, which will in turn affect the latter processes of detection, analysis and tracing. We propose a method of moving shadow detection based on local texture features integrated with linear characteristics. Firstly, an adaptive background model was built on the basis of RGB color information,...
This paper presents a self-adapting algorithm based on Mean Shift model to track the target in video sequences. Firstly, two-dimensional histogram is used to represent the target instead of one-dimensional histogram, so as to better distinguish the target from background. Secondly, algorithm has been improved by adding self-adapting progress to remove errors caused by local maximum. Experiments on...
Modern video endoscopy systems give physicians the ability to inspect internal structures of the human body by using a camera with attached endoscope optics. Video endoscopy has become routine in clinics all over the world. Moreover, video endoscopy systems recently performed a technological change from PAL/NTS C image resolution to HDTV. There is a vast amount of literature on in-vivo and in-vitro...
We propose a method for clipping a rectangular region from an image by minimizing a weighted intersection of two color histograms which are constructed with pixels included in the inside and the outside of the rectangular region. Furthermore, we extend the clipping method for images to that for videos. Experimental results show that the proposed method can clip the regions of objects from images and...
This paper introduces a hand tracking system in unconstrained environment. The system consists of two main stages which are initialization and tracking. In initialization, hand region is first detected by combining motion and skin color pixels. A region of interest (ROI) is then created around the detected hand region. In tracking stage, skin and motion pixels are scanned around top, left and right...
The usage of Gaussian mixture models for video segmentation has been widely adopted. However, the main difficulty arises in choosing the best model complexity. High complex models can describe the scene accurately, but they come with a high computational requirements, too. Low complex models promote segmentation speed, with the drawback of a less exhaustive description. In this paper we propose an...
This paper proposes a novel high-speed vision processor based on pixel-parallel PE array. The processor consists of a pixel-parallel PE array, an embedded RISC core, an AHB bus, some SRAM blocks and other logical controllers. PE array performs the low- and mid-level vision processing, and RISC core carries out the high-level vision processing in succession. The vision processor can process vision...
The retinex algorithm is commonly used to image enhancement. Recently, the image size what we usually use, is bigger and bigger. The digital camera use big size images and the television is change to HD television. So the image enhancement time is longer and longer and it needs more powerful system such as multi-core, many-core systems. But these multi-core, many-core systems or powerful systems are...
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