The NHK Twinscam is a digital-optical-mechanical

video camera A video camera is an optical instrument that captures videos (as opposed to a movie camera, which records images on film). Video cameras were initially developed for the television industry but have since become widely used for a variety of oth ...

system designed by the Japanese broadcaster

NHK , also known as NHK, is a Japanese public broadcaster. NHK, which has always been known by this romanized initialism in Japanese, is a statutory corporation funded by viewers' payments of a television license fee. NHK operates two terrestr ...

for covering

aquatic sports The asterisk ( ), from Late Latin , from Ancient Greek , ''asteriskos'', "little star", is a typographical symbol. It is so called because it resembles a conventional image of a heraldic star. Computer scientists and mathematicians often v ...

events. It uses

digital image processing Digital image processing is the use of a digital computer to process digital images through an algorithm. As a subcategory or field of digital signal processing, digital image processing has many advantages over analog image processing. It allo ...

technology to combine video from two synchronized motion-controlled cameras, one above water and one underwater, in real time, to create the illusion of a view from a single camera that can look through air and water at once as if they had the same

refractive index In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium. The refractive index determines how much the path of light is bent, ...

. It was used at the

2012 London Olympics The 2012 Summer Olympics (officially the Games of the XXX Olympiad and also known as London 2012) was an international multi-sport event held from 27 July to 12 August 2012 in London, England, United Kingdom. The first event, the ...

to televise the

synchronized swimming Synchronized swimming (in British English, synchronised swimming) or artistic swimming is a sport where swimmers perform a synchronized choreographed routine, accompanied by music. The sport is governed internationally by FINA (the ''Fédérati ...

events. It has been used for the same purpose in Japan since 2010.

References

External links

NHK press release regarding the NHK Twinscam
Film and video technology Sports television technology Cameras introduced in 2010 2012 Summer Olympics NHK {{Asia-tv-stub