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3JAI Vision News

1. Edition 2007

application case story

Advanced vision technology wows Londoners

“This is absolutely stunning. Kudos to the designers,” said one.

“WOW, this deserves to be permanent” said another. The object

of their admiration was ‘Volume’, a luminous interactive instal-

lation which attracted Londoners in their thousands to the John

Madejski Garden of the V&A Museum in South Kensington from

November 2006 to January 2007.

Brilliant display

‘Volume’ was the result of a collaboration between London-

based lighting designers United Visual Artists and Robert Del

Naja of Massive Attack and his co-writer Neil Davidge (as part

of their music production company, one point six). The walk-in

installation featured an array of light columns that responded

spectacularly to human movement, triggering a brilliant display

of light and sound.

Visitors curious to know how their motion was being detected

would probably have noticed a row of infra-red illuminators

mounted on a first floor balcony, but what was really tracking

their movement was sitting in the shadows of an alcove above

- a JAI TM-1325 CL camera, supplied by JAI’s UK distributor

Firstsight Vision, which is UK & Ireland’s largest independent

supplier of machine vision components including cameras,

optics, interfaces, software and smart systems.

Ideal solution

Firstsight Vision’s Business Development Manager Alastair

Slater describes why the camera provided an ideal solution for

the ‘Volume’ installation: “The system was designed to work

by reflecting near infra-red light from the scene to a suitably

sensitive camera with sufficient resolution and frame rate. The

JAI TM-1325 CL is a 1.45 megapixel camera with enhanced near

IR response and a frame rate of 30 Hz, so it was more than up

to the job.”

For the installation, the camera was equipped with a filter to

block all ambient illumination. Since the light columns were

static, the only variation in light reflection would come from

people moving on the scene. The signal from the camera could

then be processed to detect the location of movement and trig-

ger the emission of light and sound from each column in relation

to the proximity of movement. ‘Volume’ used components from

the Common Vision Blox image processing library, for which

Firstsight Vision is also the UK supplier.

Alastair Slater concedes that camera applications of this type

are limited, but he acknowledges that they certainly provide a

colorful and entertaining means of demonstrating what cameras

like the JAI TM-1325 CL can do.

The JAI TM-1325 CL infra-red camera

tracking peoples movements.

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