[ome-users] Maximum size supported in OMERO Importer

[Chris Allan]

Hi Sriram,

As "image" is a rather loaded term would it be possible for you to  
qualify exactly what you mean? How large are these 25MB JPEGs  
physically? 4096x4096 or greater across the X and Y dimensions? OMERO  
is currently quite poor in its support of very large 2-dimensional  
images. The memory overhead in Bio-Formats is also quite high for very  
large 2-dimensional JPEGs.

TIFFs would likely give you better performance.

Hope that helps.

-Chris

On 11 Dec 2008, at 19:17, Nandakumar, Sriramkumar wrote:

> Hi Brian,
> Thanks for the reply.
> We are trying to upload large image size of around 300 MB in Omero  
> Importer.
> However it is not possible for us to upload JPEG image of 25 MB in  
> Omero. The importer shows the status as "Analyzing".
> Since for our research we are dealing with large image sizes of more  
> than 100 MB we are finding very difficult to upload images.
> Is there any other image format which is compatible with Omero for  
> better uploading?
>
> Thanks in Advance.
>
> Thanks & Regards,
> Sriram.
> ________________________________________
> From: Brian Loranger [brian.loranger at lifesci.dundee.ac.uk]
> Sent: Thursday, December 11, 2008 5:30 AM
> To: Nandakumar, Sriramkumar
> Subject: Re: [ome-users] Maximum size supported in OMERO Importer
>
> Hmm.. tricky question.
>
> The importer is set to use up to a gig of available RAM on your  
> machine. What that translates to in terms of 'how big of an image'  
> however is very dependent on what format is being imported.
>
> If your importing a simple format with little metadata, (like a  
> basic tiff image), this should allow you to import images where each  
> plane is about 500 megabytes in size. (there's only a small  
> additional overhead for organizing multiple planes). More metadata  
> rich formats will lower the amount of available memory available for  
> the plane import process, but it shouldn't be too excessive.
>
> Are you asking this question because you have a specific importing  
> problem?
>
> Cheers,
>
> Brian Loranger
> Software Developer, Open Microscopy Environment
> Division of Gene Regulation and Expression
> University of Dundee
> (The University of Dundee is a registered Scottish charity, No:  
> SC015096)
>
>
>
>
> On 11 Dec 2008, at 01:29, Nandakumar, Sriramkumar wrote:
>
> Hi,
> I would like to know what is the maximum image size that can be  
> uploaded in Omero Importer?
> Could anyone appraise me the above info?
>
>
> Thanks in Advance.
>
>
> Thanks & Regards,
> Sriram.
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