Thursday, October 02, 2014
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Apple CarPlay Update Now Available with Firmware for Pioneer NEX In-Dash Receiver Models
Philips to Appeal $467 Million Patent Infringement Lawsuit
Rovio to Slash 130 Jobs
Toshiba Offers Ultra-small e-MMC Embedded NAND Flash Memory Products
ARM and TSMC Unveil Roadmap for 64-bit ARM-based Processors on 10FinFET Process
LG Brings Its Ultra HD 4K OLED TV To The U.S.
New Portable Power Charger For Microsoft Phones
Intel Releases Internet of Things Developer Kit
Active Discussions
Yamaha CRW-F1UX
help questions structure DVDR
Made video, won't play back easily
Questions durability monitor LCD
Questions fungus CD/DVD Media, Some expert engineer in optical media can help me?
CD, DVD and Blu-ray burning for Android in development
IBM supercharges Power servers with graphics chips
Werner Vogels: four cloud computing trends for 2014
 Home > News > General Computing > Camera ...
Last 7 Days News : SU MO TU WE TH FR SA All News

Tuesday, April 09, 2013
Camera system Creates High-resolution 3-D Images From A Kilometre Away


A team of Heriot-Watt University Edinburgh, has advanced laser technology so that high-resolution, 3-D images precise to the millimetre can be taken from up to a kilometre away.

While a standard camera takes flat, 2-D picturesm, the team obtains 3-D information, such as the distance to a far-away object, by bouncing a laser beam off the object and measuring how long it takes the light to travel back to a detector. The technique, called time-of-flight (ToF), is already used in machine vision navigation systems for autonomous vehicles and other applications, but many current ToF systems have a relatively short range and struggle to image certain objects.

Led by Professor Gerald Buller from the School of Engineering and Physical Sciences, the Heriot-Watt team has developed a new system that captures laser pulses from 'uncooperative' objects that do not easily reflect laser pulses, such as fabric, making it useful in a wide variety of field situations.

The new system works by sweeping a low-power infrared laser beam rapidly over an object. It then records, pixel-by-pixel, the round-trip flight time of the photons in the beam as they bounce off the object and arrive back at the source. The system can resolve depth on the millimetre scale over long distances using a detector that can 'count' individual photons.

The primary use of the system is likely to be scanning static, human-made objects, such as vehicles. With some modifications to the image-processing software, it could also determine their speed and direction.



The scanner is particularly good at identifying objects hidden behind clutter, such as foliage. However, it cannot render human faces, instead drawing them as dark, featureless areas as, at the long wavelength used by the system, human skin does not bounce back a large enough number of transmitted photons to obtain a depth measurement.

The light the team has chosen has a wavelength of 1,560 nanometres, 'redder' than visible light, and thus it travels more easily through the atmosphere, is not drowned out by sunlight, and is safe for eyes. Many previous ToF systems could not detect the extra-long wavelengths that the team's device is specially designed to sense.

Outside of object identification, photon-counting depth imaging could be used for a number of scientific purposes, including the remote examination of the health and volume of vegetation and the movement of rock faces, to assess potential hazards. Ultimately, McCarthy says, it has the potential to scan and image objects located as far as 10 kilometre away.

A believe that a lightweight, fully portable scanning depth imager is possible and could be a product in less than five years, according to Dr Aongus McCarthy, Research Fellow at Heriot-Watt University.


Previous
Next
Gelid Launches SlimHero CPU Fan        All News        Google Fiber Is Coming In Austin, Texas
NOOK Introduces NOOK Press Publishing Platform for Authors     General Computing News      Google Fiber Is Coming In Austin, Texas

Get RSS feed Easy Print E-Mail this Message

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2014 - All rights reserved -
Privacy policy - Contact Us .