[ome-users] Defining the size of pixels

[Paulo Almeida]

Hi Chris,

I did import the files with 4.0.0 clients, but I will try again and set the 
pixel size in the importer, just to see if it makes a difference.

I remember that overriding metadata was discussed in last year's OME meeting, 
and I agree it is not good. That was the main reason for my suggestion of 
doing it at the level of the Measurement Tool, but then again, if you don't 
store it you will have to do it every time you open the picture... unless you 
have a set of user-defined pixel sizes that you can quickly select. So, for 
instance, if you click on "My Electron Microscopy Format", it changes the 
pixel size to what you defined. Obviously this only makes sense if enough 
people have that need. 

Best,
Paulo 

On Friday 03 April 2009 12:58:13 Chris Allan wrote:
> On Fri, 2009-04-03 at 11:04 +0000, Paulo Almeida wrote:
> > Hi Chris,
>
> Hi Paulo.
>
> > Thanks, I had missed the "Metadata Defaults" tab. Just to clarify: Does
> > that work even if the image has metadata but it is wrong, or only when
> > there is no pixel metadata at all? The images I saw yesterday did have a
> > (wrong) pixel size, but I don't know if it was being imported or if it's
> > an OMERO default.
>
> Prior to 4.0.0 there was a default of 1.0 for all physical pixel sizes
> if they were not provided. In 4.0.0, physical pixel sizes are optional
> so assuming you imported the file using 4.0.0 clients and server I'd say
> the values you're seeing are definitely from the file.
>
> The intention of the dialog historically was to provide a way for the
> user to override the default metadata population (ie. 1.0) for a
> singular import and not to override the metadata in the original file.
> Since these fields are now optional the dialog's intent is still valid.
> I'm not sure about overriding the metadata in the original file... gets
> us into some muddy water rather quickly.
>
> Thoughts?
>
> > Best,
> > Paulo
>
> Ciao.
>
> -Chris