Dome Projection with single north pole projector

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Dome Projection with single north pole projector

Postby Jan Huewel » Wed Dec 16, 2009 10:51 pm

Dear all

more and more people like to do spherical and dome projections at various scales and with different amounts of projectors.

A frequent question that I have followed up on is the fact that by using a extra projector for the top north pole the image quality can be increased quite a lot but causes difficulties on how to do the warping and blending.

Since spherical content is based on a 2:1 image ratio, the example shown here is based on this type of setup.

The concept presented here allows you to use any amount of projectors for the main 360° area and a single projector for the top north pole of a dome.

If you look at the image below, it shows the overlap of 4 projectors plus a 5th one that strechtes a circular image for the north pole.

To archieve the blending for this the 5th output only needs a bottom softedge since is bend in a 360° circle. All four perimter projectors will need to be adjusted on the top softedge individually.

Please be aware that due to the different scaling of a 2:1 layer in projector 5 the y axis scaling and position needs to be adjusted to match the 4 perimeter projectors.

Image
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Re: Dome Projection with single north pole projector

Postby JackB » Tue Apr 20, 2010 12:27 pm

I'll be having a shot at this, stand by for mild panic and hopefully some good photo's afterwards!

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Re: Dome Projection with single north pole projector

Postby Patrick Verhey » Tue Apr 20, 2010 7:35 pm

Hey Jack,

good luck! If you have any questions just let us know....

best regards

Patrick
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