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To improve the efficiency of matching the corresponding points, stereo rectification is used to make the corresponding epipolar lines of image pairs be placed in the same horizontal lines or vertical lines in stereovision. In order to avoid the complicated calculation of many previous algorithms such as based on epipolar lines, based on fundamental matrix or directly depend on corresponding points,...
In this paper, we build the stereo vision system on a UAV named “Sky-walker” which was designed and created in Shanghai Jiaotong University. Used the image processing technique, we improved the feature points matching algorithm and made higher success rate. Then in the 3D reconstruction, we managed to reconstruction a large amount of 3D feature points, at last we tested the results deviation.
The concept of active tracking is presented to simulate the characteristics of human vision in intelligent visual surveillance. The Pan/Tilt/Zoom (PTZ) camera is generally used for active tracking. In this paper, we present a novel and effective approach for active object tracking with a PTZ camera, and construct a near real-time system for indoor and outdoor scenes. The tracking algorithm of our...
Real-time and accurate image matching is a key to stereo vision of agricultural harvesting robots. This research is part of a pineapple harvesting robot project. In this paper, pineapples were selected as research objects and low cost binocular vision platform was constructed, fruit area of left image was got by real-time image acquisition and rapid segmentation, rapid matching of fruit area in left...
In this paper we implement a vision based moving Object Tracking system with Wireless Surveillance Camera which uses a color image segmentation and color histogram with background subtraction for tracking any objects in non-ideal environment. The implementation of the moving video objects can be based on any one of the tracking algorithms such as Template matching, Continuously Adaptive Mean Shift...
At present, there are no adequate solutions which facilitate the interaction of computers to handicapped people. This research addresses that issue and it provides a comprehensive solution for the problem. The product provides an alternative to the conventional mouse using computer vision and voice recognition technologies as key techniques. The user can use his or her nose's relative movements to...
This paper presents a study of cell-phone camera model linkage that matches digital images against potential makes / models of cell-phone camera sources using camera color interpolation features. The matching performance is examined and the dependency on the content of training image collection is evaluated via variance analysis. Training content dependency can be dealt with under the framework of...
This paper addresses the problem of mapping three dimensional environments from a sequence of images taken by a calibrated camera, and simultaneously generating the camera motion trajectory. This is the Monocular SLAM problem in robotics, and is akin to the Structure from Motion (SFM) problem in computer vision. We present a novel map-aided 6-DOF relative pose estimation method based on a new formulation...
In this article we propose to compress depth maps using a coding scheme based on multiscale recurrent pattern matching and evaluate its impact on depth image based rendering (DIBR). Depth maps are usually converted into gray scale images and compressed like a conventional luminance signal. However, using traditional transform-based encoders to compress depth maps may result in undesired artifacts...
This paper explores techniques for multiple views target tracking in a maritime environment using a mobile surveillance platform. We utilise an omnidirectional camera to capture full spherical video and use an Inertial Measurement Unit (IMU) to estimate the platform's ego-motion. For each target a part of the omnidirectional video is extracted, forming a corresponding set of virtual cameras. Each...
In this paper, camera movements including zoom, pan and tilt could be efficiently detected for conversation scenes in movies using an improved feature point matching method. RANSAC algorithm is applied to reduce the error rate of feature matching. This implementation possesses notable significance for conversation scenes' editing and analysis. Besides, it is an essential fundamental step for constructing...
Three-line-array CCD camera was used to obtain images of lunar surface in the first step of China's lunar exploration - Chang'e-1(CE-1), this paper researched the method of lunar DEM generation by CE-1 three-line-array CCD image. We researched the imaging model of CCD image - Collinearity Condition Equations, image matching and DEM generation. And we used some CCD images to validate the algorithms,...
This paper presents a method of binocular vision obstacle detection based on SIFT feature matching algorithm. First, a model of depth measurement based on stereo vision is built, it does not require resume the three-dimensional coordinate of spatial point under the world coordinate system. According to the characteristics of the model, we proposed the binocular stereo vision calibration method based...
We present an interactive framework for rapid 3D reconstruction of objects from sets of photographs. Our framework implements advanced 2D image-based modeling techniques that accurately compute geometries of digital photorealistic 3D models in a rapid and robust method. It is implemented in an application tool to assist users to perform feature detection, matching and meshing. Our system demonstrates...
In this paper, we propose an efficient approach for real-time eye-gaze detection from images acquired from a web camera. The measured data is sufficient to describe the eye movement, because the web camera is stationary with respect to the head. First, the image is binarized with a dynamic threshold. Then geometry features of the eye image are extracted from binary image. Next using estimation method...
In this paper, we present an efficient rectification algorithm for un-calibrated multi-view images based on SIFT (Scale-invariant feature transform) feature matching. Un-calibrated rectification is necessary for some specific occasions and we extend generic stereo pair rectification to multi-view camera array with projection shift method. We bring in SIFT algorithm to extract and match features (key...
Ray-Space Interpolation is one of the key technologies in the free viewpoint television system. In this paper, a novel Ray-Space interpolation method based on hierarchical prediction is proposed. Firstly, disparity is estimated and optimized by our proposed bi-direction PDE method, then hierarchical prediction structure is proposed to interpolate the virtual views. Experimental results show that both...
This paper presents a novel approach to detecting the presence of objects in a scene from the 3D sparse disparity space obtained by stereo matching. The use of stereo imaging makes the proposed method particularly useful for detecting stationary objects without the need of learning the appearance patterns on an object or the background. Our approach is based on the fact that sparse image features...
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...
This paper describes an FPGA-based system capable of computing the distance of objects in a scene to two stereo cameras, and use that information to isolate objects in the foreground. For this purpose, four disparity maps are generated in real time, according to different similarity metrics and sweep directions, and then merged into a single foreground-versus-background bitmap. Our main contribution...
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