Dome Projection with extra North Pole Projector
Posted: Fri Aug 29, 2008 4:36 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.
If you have questions or suggestions for other setups let us know.
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.
If you have questions or suggestions for other setups let us know.