http://news.bbc.co.uk/1/hi/technology/10446419.stm
Quality warnings issued over 3DTV
TV manufacturer Samsung recently announced that it will be including automatic conversion software - TriDef, developed by DDD - in all of its new 3DTV sets, enabling viewers to instantly "upscale" standard live television into a 3D experience at the push of a button.
TriDef is already embedded in Samsung mobile handsets and Acer laptops.
This type of software has alarmed the film industry, with claims that the automated result is inferior to filming with specialist 3D cameras or using an expensive post-production process.
At a conference in May, Hollwood film director James Cameron - the man behind the animated 3D epic Avatar - warned the result of cheap conversion were "eye strain and headaches".
Panasonic refused to include the software in its 3D sets over quality concerns.
"'We don't think it's right to confuse consumers this early on with second-rate conversion technology,' Fabrice Estornel, product manager at Panasonic TV, told website Home Cinema Choice (HCC).
Automated software tends to work on basic algorithms, said Graham Thomas, a broadcast expert at the BBC's research and development labs.
"They all work by using some simple tricks, which work most but not all of the time," he said.
One method is to automatically make the lower half of the picture appear to be at the front and the upper half behind, said Mr Thomas.
Others are programmed to move colours, such as making greens appear closer and blues further away, while DDD uses a combination of motion capture and colour to create the illusion of depth.
"Depending on the content, it will generally either work well or look weird," said Mr Thomas.
"I think the technology will improve but fundamentally it's difficult to get the depth without the cameras."
However there are some shots that even the 3D cameras cannot capture, he warned.
A tight zoom - onto a sports player on the other side of a pitch for example - proved impossible for stereo cameras used during a 3D experiment while filming the recent Six Nations rugby cup, said Mr Thomas.
However he also took a dim view of the automated software solution.
"I think if I'd gone out and spend 5000 on a 3DTV and I was seeing work processed through one of those, I'd feel short-changed," he said.
"They are gimmicky."
Chris Yewdall believes that that the automated approach has a place in the 'pyramid' of 3D conversion techniques.