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In this document we present a method for calibrating head-mounted displays and other display surfaces using an automated, low-cost camera system. A unique aspect of this method is that the calibration of geometric distortions, field of view, and chromatic aberration are achieved without the need for a priori knowledge of the display system's intrinsic parameters. This method operates by capturing...
Stereoscopic tabletops offer unique visualization capabilities, enabling users to perceive virtual objects as if they were lying above the surface. While allowing virtual objects to coexist with user actions in the physical world, interaction with these virtual objects above the surface presents interesting challenges. In this paper, we aim to understand which approaches to 3D virtual object manipulations...
In the field of machine vision, a very important task is to use the visual information to estimate the attitude of camera. The traditional approach is to embed a visual mark in the image's texture for attitude estimation. However, a visual mark would spoil the unity of the image. This paper introduces a novel attitude estimation method using the spatial frequency domain analysis. In this method, the...
STUDSAT - 2 is a Student Satellite Program carried out by the undergraduate students from seven engineering colleges from the state of Karnataka, India. STUDSAT-2 is India's First Twin Satellite Mission which aims to demonstrate Inter-Satellite Communication and improving temporal resolution by taking images of the same part of the earth by the Twin Satellites. STUDSAT-2 consists of two Nano Satellites...
In this paper, a novel scheme of two-stage multiview image compression is proposed to create two-level reconstructed quality. Differently from the conventional multiview image compression algorithms, SIFT (Scale-Invariant Feature Transform) features matching from interview images are exploited to remove the correlations between multiple views. In the first stage coding, SIFT and RANSAC (RANdom SAmple...
In this paper, we are tried to show for various 3D reconstructions from three cameras video sequences prior to decoding. Scene changes may be easily detected all the images on the projective geometry. If all the images which include subject are the reconstruct the synthesizing various picture from new viewpoint to different views likes 2D and 3D style. The Picture reconstruction all the time it's...
Online Maintenance Assistance (OMA) is a tool for supporting Remote Maintenance. It was developed by Airbus and the University of Applied Sciences Osnabrueck, Germany. Operators performing maintenance tasks in front of an aircraft can use OMA to establish a conference to a remote expert. They can provide different camera views on of a maintenance part or location. In addition, the screen output of...
In this paper, we propose a method for car accidenst detection in parking lots. The proposed method consists of two steps. In the first step, a car is detected by foreground extraction and motion map. In the final step, a car accident is detected by the magnitude of motion along with moving direction of the car. Experimental results show that proposed method effectively detects car accidents in parking...
Close-range Photogrammetry is widely used in many industries because of the cost effectiveness and efficiency of the technique. In this research, we introduce an automated coded target detection method which can be used to enhance the efficiency of the Photogrammetry.
This paper presents an automatic region-adaptive focal-length estimation method to correct a fisheye-lens distortion. The proposed method consists of three steps; i) generation of criteria for estimating focal-length, ii) region-adaptive focal-length estimation, and iii) correction of the fisheye lens distortion using the orthographic projection model. Experimental result show that the proposed method...
Consumer-generated product evaluations posted on online retailer or third party web-sites have been shown to increase buyer trust and aid consumer decision making. These online reviews typically have two components: star ratings and review text. This can communicate a complex, conflicting message to consumers, as the text of a review carries more nuance than what can be communicated through a simple...
Due to the advances in mobile technology, mobile augmented reality has been widely used for many disciplines. The ubiquity nature of mobile augmented reality supports a flexible, engaging and entertaining learning environment. However, most mobile devices are hand-held, and they require multitasking (mobile information processing and learning) that is a major hurdle for learning. This paper investigates...
In order to recognize and control effectively dynamic information, the paper proposes the concept of F-recursive genetic information by introducing the concept of heredity in biology and using P-sets, including the concepts of F-recursive dominant inheritance information and -F-recursive recessive inheritance information. Meanwhile, the structure and characteristics about the F-recursive genetic information...
This paper proposes a hand gesture recognition system for human-robot interface. Our research aims to provide users user-friendly operations in a more intuitive manner. We use the stereo camera to capture images as the primary source of information retrieval, and adapt Gaussian mixture model (GMM) method as the main method of image analysis. The GMM method we applied in this paper is a precise, stable...
We propose an image retrieval based method for visual localization in indoor scenes, provided that a geotagged image database in indoor environments is given. For image retrieval, we introduce a voting based image similarity which is robust to geometric image transformations and occlusions. In order to further improve the performance of image retrieval, we introduce two additional procedures: multiple...
In this paper, we describe an efficient projective rectification method that can be applied to trinocular rectification to improve the visual appearance of stereo vision. This method expends the matrix-based correcting homographic approach which has been proposed recently. In order to implement trinocular rectification, firstly, we obtain triplet images from the target objects through three cameras...
The use of wide angle lens on commodity cameras are becoming increasingly popular. However, this leads to image distortions due to the large difference in relative orientation of the different foreground objects with respect to the camera's image plane. More importantly, these distortions are different in different parts of the image since it depends entirely on the position and orientation of the...
In this paper we examine issues of deploying a camera network in a complex environment with obstacles. A camera network is composed of a distributed collection of cameras, each of which has sensing and communicating capabilities. To deploy such camera network, we present a kinetics based particle swarm optimization (PSO) approach. By introducing a kinetics-constraint factor to standard PSO, the fields...
Unmanned Aerial Vehicles (UAVs) have been widely used in intelligence gathering, psychological operations, laser designation, range-finding, and communication. In this paper, the design of a fixed-wing UAV is presented. A target detection and localization method is proposed for the developed UAV. The hardware construction, along with the selection of necessary components, is introduced. In order to...
The virtual view synthesis reference software offered by the MPEG standard committee adopts the forward warping technique in projecting the depth map from the reference view to the target (virtual) view location. Often, this warping process results in many artifacts, holes and cracks, due to quantization errors and occlusion. In this study, we propose a backward warping process to replace the forward...
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