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Recently, data transmission has become more important in our daily life. The developments of communication component are diverging with electromagnetic (EM) techniques. According to the popularity of wireless communications, the limitations of transmission also appear. Especially, electromagnetic interference (EMI) and frequency spectrum shortage would limit the application of wireless communication...
As the rapid development of the Internet of Things (IoT), communication between object, device and machine becomes a popular topic. The application of barcode has become an irreplaceable technique in the field, which provides a new way to embed various information such as hyperlink and text. In this paper, we present a novel voice-based 2D barcode system, which directly embeds voice into a barcode...
This paper presents a new way of exchanging data such as images and text files via mobile devices in the absence of existing wireless technologies, namely WiFi and Cellular Data Network in a personal area network. It does not incur the overhead of Bluetooth pairing and discovery. This application, ColorQR, sends data through the manipulation of colors into multiplexed QR codes. Data is encoded into...
Contemporary camera-equipped wearable devices, such as smartphones and tablets, are now powerful enough to be used as ubiquitous remote sources of live video streams. However, as these devices may operate in various positions, including upside down or rotated, encoding the captured video into a data format suitable for live streaming also includes the rotation of video frames to compensate the device...
This paper proposed a visible light communication system (VLC) based on mobile devices. The transmitting and receiving units were realized by using the display screen and camera of the mobile device. The data were converted to screen code before transmission, and were captured by the camera and decoded from the screen code to original data. The proposed system can operate up to 80Mbps theoretically...
We evaluate the scalability of a multiple view distributed approach to recording presentations that utilizes camera equipped mobile devices. We show this approach is scalable in terms of video resolution, bandwidth and power. This scalability enables users with a broader range of mobile devices to effectively participate in presentations. We show our approach is less expensive, more scalable, flexible...
With certificates becoming massive nowadays, anti-counterfeit of certificates turns into an urgent task. The emergence of 2D code provides a kind of effective method for anti-counfeit. Encoding biologic feature (fingerprint) and individual information into QR code. Through realtime collection of the certificate holder's fingerprint and QR code, deciphering the information to authenticate the validity...
A photograph authenticity technique is developed for mounting in programmable telephone terminals housing a camera, clock, and GPS. The technique uses fragile digital watermarking to embed original photos with the time the photo was taken and the shooting location. By making it possible to prove precisely when and where evidentiary photos were taken, it enables authenticity verification of traffic...
QR codes (2D barcodes) are used to encode and decode data at a rapid rate. Using camera phones to read two dimensional barcodes for various purposes is currently a popular topic in both research and in practical applications. But until now, the information provided by QR codes was solely static. What you see is exactly what was encoded. This paper proposes the notion of contextual QR codes that merge...
In this paper, a predictive model for compression of mosaic image with Bayer pattern is proposed. It consists of TFNN neural network predictor and adaptive correction part based on context. As in JPEG-LS, the adaptive part of the predictor is context-based and it is used to ldquocancelrdquo the integer part of the offset due to the TFNN predictor. In the meantime, we propose a context quantization...
2D bar codes were designed to carry significantly more data than its 1D counterpart. Thanks to the popular combination of cameras and mobile phones, it will naturally bring great commercial value to use the camera phone for 2D bar code reading. This paper addresses the problem of specific 2D bar code design for mobile phones and introduces a low-level solution of matrix codes. At the same time, we...
Bar codes are being widely used in many fields for applications of great commercial value. By encoding a series of characters or symbols, bar codes are able to both carry explicit information and a database key. Nowadays, The availability of imaging phones provides people a mobile platform for decoding bar code rather than the use of the conventional scanner which is lack of mobility. However, the...
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