Tile size matters?

[David De Mena García]

Hi Benjamin and Maxim: 

There are also other factors like network
speed and memory used. We have made some test about and there is no
perfect combination off tile size and number of levels: Ad example, if
you work with OpenSeaDragon and you have "small" tile size you have to
make a lot call the image server to get the tiles what it's good if you
have a quickly server and slow network bat very bad if you have the
opposite. Or if you are processing an image counting cells and you have
a small tile size you can process more thread in parallel because you
will consume less memory in every one, but you will have a lot of border
case (when your patron is in both tiles)...  

So always is depend on
your application, your workstation and your network speed.  

Best  

--

David de Mena García
Anatomía Patológica
H.U. de Jerez

El 27/09/16 a
las 08:22:15, Benjamin Gilbert via openslide-users escribió: 

> On Sat,
Sep 24, 2016 at 07:55:52AM +0200, Maxim Untesco via openslide-users
wrote:
> 
>> does a tile size in a .tif piramide influence the quality
and the speed of virtual slide visualisation?
> 
> I'm sure it does to
some extent, but I haven't benchmarked it. I would
> guess that a large
tile has better throughput than a combination of several
> smaller ones
*when reading all of the pixels*. The disadvantage of large
> tiles is
that if you only want a few pixels (perhaps because you only need
> data
from the edge of a tile) you have to decode and throw away a larger
>
number of pixels.
> 
> The *latency* of reading a large tile will be
higher than for a small one. 
> For viewers that render the image in
pieces (e.g. OpenSeadragon) that might
> affect the perceived rendering
performance.
> 
> --Benjamin Gilbert
>
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