Remotely viewing large tiled image datasets

Details Remotely viewing large tiled image datasets Remotely viewing large tiled image datasets

2011-01-18

2011-01-18

Broome, Said (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Adjusting level of detail

C345S418000, C345S661000, C382S148000

Reexamination Certificate

active

07872650

ABSTRACT:
Systems and methods are described for remotely viewing large tiled image datasets, such as global maps at multiple resolution levels. A voting schema immediately retrieves the image tiles in a multi-resolution image dataset that are most likely to provide temporary complete coverage of a given browser view while more numerous optimal image tiles for the current resolution level of the browser view are still downloading. Image tiles that are not locally available are assigned one vote toward immediate download while their parent and higher-order image tiles accumulate increasing multiples of the vote. This provides panning and zooming such that it is difficult for a user to outdrive the update speed of the changing view. The system can also enhance navigation to provide natural and responsive movement of the browser viewport while image tiles are being downloaded.

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