According to the angle and intensity, then calculate a spatial position of the light source and camera position. In this paper, an efficient tracking is accomplished by the transforming of pinhole model to the illumination model and im posing restrictions related to the gradient magnitude and the corners. A method based on background reconstruction has a large impact on the environment such as light shifting and gives low robustness. A method based on contours extraction is hard to enhance the precision of the centroid tracking and unsolved the problem of lighting and camera angles. To begin with we will provide a brief background on the traditional research techniques which can be divided into contours extraction and background reconstruction. INTRODUCTION In this paper, we focus on the need fo r light source feature extraction and analysis, as it is much more important in the laser communications, laser guided and light source detection. Keywords: Light illumination tracking, Singular points, Li ght properties quantification, Point descriptor 1. A light source tracking method is under experiment. We think that this method would present a way that helps us to research in a different way and describe illuminant not only based on physical quantities, but also on the feature in the image. The results show that it shows a great potential on the problem of quantifications for light sources and tracking. The entire model does not need any limitations for the light sources, which greatly enhanced the applicability of this model. In this paper an algorithm based on light radiation model and combined with the singularities of gradient descent and strengthening method to describe the light sources is presented, which gives a way to describe light sources. Our future work will focus on enabling the iTracking system to writing Chinese characters in flashlight. We examine point light based tracking and flashlight based tracking in our demonstrations, which proves these two main sources of light in our daily life can achieve centimeter-level location-tracking requirements. Our main contribution is the first demonstration to track mobile light sources based on light intensity with high accuracy, which may provide an alternative method for localization and tracking or inspire game designers. The iTracking system is a mobile light source location-tracking system based on light intensity. In our paper, we propose to utilize light, an easily accessible and pervasive resource in our daily life, and off-the-shelf TelosB Motes to achieve the goal of stability and high accuracy in localization and tracking. However, systems using RF signals suffer accuracy fluctuations and systems using ultrasound or UWB need extra hardware. Any less, and you’re inviting a negative backlash that could ultimately leave your stakeholders looking to the competition for a less invasive option.Most previous localization and tracking systems in wireless sensor networks are based on RF signals, ultrasounds, and UWB.
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