Posted by
fabrice senger-2 on
URL: http://imagej.273.s1.nabble.com/metadata-and-time-depiction-tp3687079p3687081.html
Hello,
I had such a piece of discussion off-list with Dan White.
As I work with stk files, i have access to the image creation time (this is
accurate even you pause the acquisition), I have access to this info with
the LOCI plugin and some code Melissa kindly sent me.
What would be of interest is a tool like a time slider as you can get it in
Metamorph or in Imaris...or then : "
> Are you suggesting that you would like to see the timestamp in seconds
> displayed as part of the label at the top of the image window?"
>
This is probably a particular situation when you have to pause acquisition
for one or two acquisitions but in this case dynamic measurements would not
be accurate if based on time intervals (?!)
Thank you for your reply,
Best,
Fabrice.
2010/8/26 Curtis Rueden <
[hidden email]>
> Hi Fabrice,
>
> as follow up to a previous mail, i just wonder why the time dimension is
> > always depicted as t (time frame) and not in real units as sec.
> > Indeed, using the LOCI plugin it is possible to retrieve metadata from
> > almost every format.
> >
>
> The Bio-Formats Importer does populate the frame interval in the image
> properties when that information is available. In the case of variable time
> between frames, we average the times and populate the frame interval with
> the mean (though the eventual goal is for ImageJ to support variable time
> frames directly). And I believe that in general, ImageJ uses the frame
> interval value for the frames per second when animating—adjustable by right
> clicking the Play button next to the time slider.
>
> Thus it would be interesting to have direct acces to those parameters.
> >
>
> Are you suggesting that you would like to see the timestamp in seconds
> displayed as part of the label at the top of the image window?
>
Yes this is what I think about!
>
> As example, if you do time-lapse and have to pause your acquisition for one
> > or two acquisition, you could not use the time interval, but the metadata
> > acqusitionTime is still relevant.
> >
>
> Whether such a pause is properly recorded in the metadata depends on the
> file format. As I said above, Bio-Formats averages the timestamps, so you
> should still get a reasonable frame interval in the properties, as long as
> the correct values are really present in metadata.
>
> -Curtis
>
> On Thu, Aug 26, 2010 at 5:48 AM, fabrice senger <
[hidden email]
> >wrote:
>
> > as follow up to a previous mail, i just wonder why the time dimension is
> > always depicted as t (time frame) and not in real units as sec.
> > Indeed, using the LOCI plugin it is possible to retrieve metadata from
> > almost every format.
> >
> > Thus it would be interesting to have direct acces to those parameters.
> >
> > As example, if you do time-lapse and have to pause your acquisition for
> one
> > or two acquisition, you could not use the time interval, but the metadata
> > acqusitionTime is still relevant.
> >
> > Thank you,
> >
> > Fabrice.
> >
>