Sunday, July 30, 2006

Bioscience Photography Competition and 3D photos

The Centre for Bioscience at The Higher Education Academy, University of Leeds, are launching a photographic competition on the theme of 'Bioscience in Action' where they are asking for entries from non-professional photographers on any angle of bioscience, including teaching it. The prizes are £500, £200 and £100 for first, second and third winners. There’s a few rules and regs, those and the entry forms etc. are all on their webpage here.

Imagine if instead of looking at photographs, you could walk through them. How amazing would that be? That's what a new computer programme may enable people to be able to do, and it could be ready in 2006.

The software firm Microsoft has come up with a way of matching up different images of a particular subject and then collecting them together in one virtual 3D model. A computer user could then walk or fly through the scene to look at any of the pics from any angle. Wow!

The technology is expected to be available online. People could upload their photos to a website, and then combined with other images, could produce a 3D model. The technology, called Photosynth, could also be used in tourism, with visitors able to take a virtual tour of some kind to see if they like the look of a place before they go. Right let’s have a look at the latest rides at Alton Towers.

It sounds a bit like the Magic Eye pictures that were so popular in the 1990’s. These were also known as 3D stereograms. People used to stare blankly at an image of coloured dots and swirly things, crossing and uncrossing their eyes, saying “I think I can see it – is it a goat on a skateboard?” Actually no, it’s supposed to be someone’s corporate logo. So you see the problem, not everyone can do it. Also you need vision in both eyes to do it. So no chance for Nelson then or poor old King Harold.

The grandfather of 3D art and stereographical headache is Charles Wheatstone. In 1833 he accidentally discovered that because human eyes are set a short distance apart, images viewed through one eye differ slightly from the other. This creates an illusion of depth. Five years later, he invented the stereoscope. This is a binocular device through which a pair of monocular images are projected to both eyes. The optic axes converge at the same angle, thus giving the impression of a solid 3D image. Say that again in English. No on second thoughts don’t bother. Basically the brain can be fooled into thinking it’s seeing something it’s not. Optical illusions eh?

Test your logic - can you think outside the box?
























Remember - you are only allowed 1 minute!
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How well did you score? Comments welcome!

Have you ever wondered how those vending machines worked?

Thursday, July 6, 2006

What is this pic?

Hints:
•I was discovered in 1976
•I was the subject of a 2000 movie starring Gary Sinise
•I was once believed to be evidence of alien life

Answer:
The original Mars face caused a sensation when images of a face-like hill produced by Viking 1 in 1976 were published across the world. The face, along with nearby pyramid-like structures, was believed by some to be an artificial structure constructed by alien life as a message to Earth. It was made the subject of a movie; Mission to Mars in 2000. The structure is a flat-topped hill, called a mesa, in which different rock types have eroded at different rates to produce the features of the face. Nice try with Keith Richards!

The world's smallest football pitch!

A German scientist has used nanotechnology to create what he believes is the world's smallest soccer pitch.

Dr Stefan Trellenkamp, from the University of Kaiserslautern, made the pitch by using an electron beam to engrave lines onto a tiny piece of acrylic glass.

The pitch measures 380 by 500 nanometres and can only be seen through an electron microscope.

"I am really, really proud," the nanotechnology researcher says.

"The only problem is that I really don't know what to do with it. I can't put it on show as no one can see it," he says. "I guess it'll just stay in my drawer for the time being."

Trellenkamp says it took him a whole day to etch the pitch, which is so small that 20,000 of them could fit onto the tip of a human hair.

Saturday, July 1, 2006