New software application uses artificial intelligence to calculate images of reality based on incomplete data

Astronomers are now making observations of the universe in nearly all wavelengths, but, in contrast with telescopes for example, the information recorded by radio telescopes is delivered in the form of X-rays and gamma rays. The majority of images obtained from these instruments are the result of complex calculations developed specifically for each individual telescope.

However, a complete picture of a given celestial object can only be created by comparing the data from different fields, which is why it is desirable to combine the images from all these instruments.

This is possible using a concept known as information field theory, which works in the following manner: assuming one wishes to depict the temperature distribution over Germany, this would correspond, in theory, to an infinitely large range of temperature values. Yet, in practical terms, only a finite number of values can be measured.

A computer calculates the entire temperature field based on this incomplete coverage. To ensure a successful result, the computer is primed with certain known laws - for example that temperature differences rarely leap between adjacent areas.

NIFTy (Numerical Information Field Theory), with which Torsten Enßlin and his colleagues succeeded in determining the spatial distribution of dust clouds in the Milky Way, operates on the same principle, using data from the European space observatory, Gaia, which measures the distances between stars and records them through several colour filters.

The differential brightness of these filter fields makes it possible to estimate the dust volumes through which the starlight has passed en route to earth. "From the positions of the stars and dust volumes between us and them," says Enßlin "we were able to calculate the spatial structure of the dust clouds."

The challenging thing about this task was that the available data was actually too scant for an accurate reconstruction, which is why, as Enßlin says "we assumed that rather than varying arbitrarily from pixel to pixel, the dust density would obey statistical laws." Physicists talk of a correlation, yet this correlation function is often unknown and must be determined as part of the overall calculation. "That's why," the Max-Planck researcher explains, "we continuously check which correlation function fits best with the data throughout the entire calculation and use it for imaging. This method of non-parametric self-adjustment of the process makes us the global leaders in this field."

Based on the correlation data, NIFTy5 not only generates a map of the dust cloud but also provides a chart that shows the degree of uncertainty of the accuracy of the model for every single pixel.

The human brain works in a similar way. If we look at something like a particular landscape, it develops various hypotheses about the structure of what it is seeing whilst simultaneously applying them as operating instructions - for example for deciding on the best route through a given locality.

Enßlin's team used an artificially generated scene to prove that NIFTy5 really works. To do this, the researchers created a wave field on the computer based on random events then dotted it with fragmentary measuring points that only covered part of the entire wave system. The programme then reconstructed the entire wave field from the data with no prior knowledge of the wave dynamics, an understanding of which it learned.

In addition, NIFTy5 has become faster due to further mathematical innovations, including the implementation of a process known as "variational inference by means of metric Gauß", which requires far less memory space for the calculation than was formerly the case.

"Not only does this make NIFTy5 faster than its precursors, it also gets by with poorer-quality data," Enßlin explains. This, he goes on to say, may make it possible to reduce exposure to X-rays during computed tomography imaging, whilst retaining the same image quality.

Website search

Recently updated

T3 Commandline Scanner T3 Commandline Scanner Check your computer for malware and eliminate it on sight using this virus removal tool wrapped in a command-line interface, which requires the IKARUS virus definitions
Quick Heal Total Security Quick Heal Total Security Complete PC security against malware, featuring email, Internet and network protection, parental control, removable drive scans, system optimization and maintenance, and more
ESET Smart Security Premium ESET Smart Security Premium Advanced protection system for your PC that relies on a robust antivirus engine, providing secure online transactions, webcam protection, and an integrated password manager

Software News

Mar 28
Germany's air traffic control agency says it has resolved a software problem that has forced it to reduce flight capacity over part of the country for the past week.
Mar 27
Android: Researchers tell troubling findings of pre-installed software
A study "An Analysis of Pre-installed Android Software" says pre-installed Android apps amount to a boatload of privacy issues. Just ask IMDEA Networks Institute, Stony Brooks University, Universidad Carlos II de Madrid and ...
Mar 27
Make a choice: Do you want to engage with your media passively or actively?
Mar 26
Chromium-based Edge browser yet to launch but early peeks are positive
What a concept. Rebuild Microsoft Edge (yes, please do) and have it run with Chromium (hmm, ok)? That is what is happening with the Microsoft launch to come soon. And comments are already coming forth, with a build of the ...
Mar 25
Professor Andreas Schütze and his team of experts in measurement and sensor technology at Saarland University have released a free data processing tool called simply Dave-is a MATLAB toolbox that allows rapid evaluation ...
Mar 22
A free, open-source toolkit to help researchers deal with data management overload has been devised by the John Innes Centre Informatics team.
Mar 16
Rock, scissors, flower, box. Lookout informs blind
It looks as if Microsoft and Google are making 2019 the year of impressive gains in maximizing AI as a technology enabler for people with low vision and blindness. Microsoft and Google have both recently sent out good news ...

About us

Welcome to new crack resource! Our service can generate cracks, keygens and serials for your software to unlock it. CrackDownloadz provides a lot of popular cracks and keygens. No spyware and adware at all, just download new cracks, keygens and serials. If you have a software that needs a crack feel free to contact us.

Also you may contact us if you have software that needs to be removed from our website.