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We show the first camera based (privacy-preserving) indoor mobile positioning system, CaPSuLe, which does not involve any communication (or data transfer) with any other device or the cloud. The algorithm only needs 78.9MB of memory and can localize a mobile device with 92.11% accuracy. Furthermore this is done in 1.92 seconds of on-device computation consuming 3.77 Joules of energy, as evaluated...
This paper describes a method to recognize a Quick Response Code (QR) a novel. The QR Code is a two-dimensional code, which is currently used in various fields. According to the salient growth smartphone market, the recognition distance of QR Code is increased but the recognition angle is still limited. To tackle the issue, we propose a QR Code recognition method using ‘cloud-based pre-generated image...
Because of the increasing popularity of camera-equipped mobile devices, image matching techniques offer a potential solution for indoor localisation problems. However, image matching is challenging indoors because different indoor locations can look very similar. In this paper, we compare two image-based localisation approaches on realistic datasets that include images from cameras of varying quality...
Nowadays, the mobile phones are becoming part of our daily life. They transformed from communication devices to personal computers. They are capable of storing personal information and connect to other applications where security is required. The need for securing the confidential information and the other application is increasing every day. Fingerprint authentication has been used in many different...
In this paper, the compatibility of fingerprint images captured with mobile cameras (touch-less) with existing touch-based commercial fingerprint verification software VeriFinger SDK is investigated. The touch-less fingerprint images taken with mobile cameras are different with the fingerprint images captured from touch-based scanners. The research in this paper shows that the commercial fingerprint...
This paper presents a framework enabling 6-DOF interaction with generic visualization environments through mobile devices. Features computed on image frames captured by on-board camera are used to develop an affordable and effective 3D user interface.
The computational capability of mobile phones has been rapidly increasing, to the point where augmented reality has become feasible on cell phones. We present an approach to indoor localization and pose estimation in order to support augmented reality applications on a mobile phone platform. Using the embedded camera, the application localizes the device in a familiar environment and determines its...
Mobile multimodal biometric systems have been recently used to overcome the limitations of unimodal biometric systems and to achieve high recognition accuracy. However, the conventional embedded mobile biometric systems have low processing power and small storage so they are insufficient for processing many biometric data. In addition, user feels inconvenience because they capture biometric data in...
In our previous result, a GPS-enabled (global positioning system) device is incorporated into visual surveillance to provide a novel visual tracking service. A person carried such device can be tracked not only on a digital map, but also in the real-time camera image. However, the approach relies on a calibration method with five calibration points for transforming a GPS coordinate into an image coordinate...
In this paper, we deal with the recognition of musical scores in a low resolution image captured by the digital camera of a mobile phone. Compared to clean, scanned images, low resolution images contain music scores with severe distortions or irrecoverable discontinuities. Most of existing approaches for scanned music scores cannot be applied to the scores with such damages. In this paper, we present...
This paper addresses disparity estimation from image pairs by error minimization. When taken from a monocular camera pan sequence, those images often suffer from luminance variations, caused by the spatially and temporally separated camera positions. Therefore, here we discuss and analyze an existing correction approach for the block matching algorithm. From the observations made we derive a new approach...
Panoramic images, which are often produced off-line a while after the photos are taken, might be an entertaining application if they were generated on mobile devices immediately. Since producing a panorama requires feature extraction and matching that are expensive for mobile devices, an embedded panoramic system needs different approaches. Therefore, for on-line mobile panoramas, we propose methods...
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