Public Health Applications of High-Speed Photography

Phase Frequency Detector Using Transmission Gates for High Speed Applications

In this paper a new phase-frequency detector is proposed using transmission gates which can detect phase difference less than 500ps. In other word, the proposed Phase-frequency Detector (PFD) can work in frequencies higher than 1.7 GHz, whereas a conventional PFD operates at frequencies less than 1.1 GHz. This new architecture is designed in TSMC 0.13um CMOS Technology. Also, the proposed PFD a...

Coded Strobing Photography: Compressive Sensing of High-speed Periodic Events

We show that, via temporal modulation, one can observe a high-speed periodic event well beyond the abilities of a low-frame rate camera. By strobing the exposure with unique sequences within the integration time of each frame, we take coded projections of dynamic events. From a sequence of such frames, we reconstruct a high-speed video of the high frequency periodic process. Strobing is used in...

Images and reflections: photography in the pursuit of public health.

The photographic image has long been used in journalism to document events and circumstances, to attract attention, and to stimulate debate and action. That of itself implies that photography can contribute to change in the social and political climate, which in turn can have a powerful influence on public health. Whether or not photography is also an “art” form, with all the subtlety of expres...

High-Speed Wireless Baseband Applications

High Resolution DEMs for Urban Applications from NAPP Photography

Digital Elevation Models (DEMs) are widely used in many GIS and resource management applications. Increased use of DEMs has led to greater demand for higher resolution and higher accuracy digital elevation data. Here we demonstrate that digitally-scanned 1:40,000-scale NAPP aerial photography, used in conjunction with precision ground control, can be used to generate DEMs with horizontal resolu...