PanoTools:
Re: Not PTGui - Question on Fspviewer Maximum File Size
Fulvio Senore 2005-Sep-17 22:42:01
Wow, it's a really huge file!
Since each pixel uses 4 bytes in most graphic cards (some use 3 but they
seem to be on the road to extinction) your file will use more than 1.2
GB of ram just to store it. You will need such a block of free memory to
open the file, plus some more for other tasks.
FSPViewer should not have memory limitations by itself: it will try to
allocate the needed memory from Windows and it will report an error if
Windows will not be able to allocate it. I am not an expert but you
might have more memory in your computer but, if it is fragmented,
Windows might not be able to find a single block of contiguous memory
large enough.
BTW, even if opening such an image in FSPViewer might be interesting in
order to be able to zoom in a lot, the image quality when viewing at
normal field of view will not be optimal because the image has to be
reduced a lot and the current implementation will degrade image quality
to save speed. You are likely to have a better image quality if you open
a smaller version of the file.
I might think about fixing this problem: in a few years things have
changed a lot and now we are using file sizes that were difficult even
to imagine when I designed the vieweing engine.
Fulvio Senore
John Hollenberg ha scritto:
>Question for Fulvio (others may also answer :-)
>
>How large a file can Fspviewer handle? As you know, I have run a 60
>MB jpeg succesfully, but thirst for more. Fspviewer chokes with "Out
>of Memory" when I try to load a 107 MB jpeg (pixel dimensions 29,000 X
>11,032, about 320 megapixels). Is there an (easy) way to make this
>work, or is it fundamental to the design of Fspviewer?
>
>BTW, I tried Pano2QTVR, but much prefer the feel of fspviewer.
>
>Thanks.
>
>--John
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