[vtkusers] Subdividing & LOD large amount of data for effective rendering and interaction

Zee zynique.schoeman at gmail.com
Wed Aug 31 16:12:31 EDT 2011

Hi there
we need to develop an application that displays a mosaic of JPEG pictures,
showing aerial photographs of a strech of coast. It should allow the user to
zoom or pan as they please (as they need to count seals lying on the beach).
So far, the application already allows the loading of a single photo as well
as zooming and panning - but the total area the user should be able to iew
consists of hundreds of photos!

Obviously it will be inefficient to load all the photos at once, and one
will most probably run out of memory. As an alternative we want to reduce or
increase LOD as the user zooms as well as load relavent photos (or parts of
photos) as the user pans. 

We were thinking of using vtkRenderLargeImage or maybe vtkImageReslice to
load the images as required, while vtkLODActor takes care of the LOD as the
user zooms. 

Are these classes the correct classes to use? or is there a better option?

Thank you in advance

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