download datavideo se-3000-8 product manual - Go Electronic

Chroma Key OverviewThe Chroma Key feature of the SE-3000 is really easy to use. TypicalBlue and Green screen studios can be quickly incorporated into anSE-3000 production.First we will go over some basics, the Control Panel buttons andfinally a simple green screen example set up. For those of you whoneed a quick reminder here are a few Chroma Key basics.A good foreground image helps produce a good keyThe camera, backdrop and lighting setup will all play an important role in producing the best Chroma Keyresult. Although the SE-3000 is equipped with excellent keying controls it is always best to start with the bestkeyable image that your setup is able to produce.Three Chip CameraWe strongly recommend the use of a three chip (or CCD) camera for Chroma Key shooting. The extra imageclarity and the good colour separation that a three chip camera produces really does improve the quality ofthe keying later on.Do not mix SD and HD standards when keyingIt is best to avoid trying to use standard definition SDI green or blue screen footage with a HD backgroundbecause the keying edges in the SD image will become fuzzy during the SD to HD upscaling process. If youhave a full HD background then for best results work with a full HD camera for the foreground too.White Balance the CameraWhite Balance is extremely important when setting up a chroma key studio. The camera must be correctlywhite balanced to minimise the subject picking up any colour cast from the background. Of course the whitebalance settings will vary according to the type of lighting you are using, but neutral whites and good skintone colour are the all important target.To set the white balance you will need a white reference card (or a sheet of white paper). Focus the cameraon the reference card and light it evenly using the main light. Set the camera’s iris / aperture so that the cardis correctly exposed. Use the Auto White Balance (AWB) function, or set the white balance manually so thatthe card appears white. If you are in any doubt about how to white balance your camera, please refer toyour Camera’s instruction manual for more details.37