Re: X-Y coordinates to pixels

Posted by Gabriel Landini on Feb 03, 2006; 8:13pm
URL: http://imagej.273.s1.nabble.com/X-Y-coordinates-to-pixels-tp3703825p3703829.html

On Friday 03 February 2006 14:12, Leslie Day wrote:
> Okay. Then I rephrase my question... How can I get image J to give me
> another measurement of a point, besides pixels. Some that is much more
> precise and can help me measure small amounts of movement?

One cannot draw ROI with sub-pixel accuracy in ImageJ.
Even if one could, I guess that it would be difficult to argue that one can
consistently do it, or that there is really an advantage, given that the data
one has to analyze has a coarser resolution than the ROI one is defining.
Instead, it is better and easier to obtain images with more resolution.

> I am not sure what a Gaussian is.

It is a function that describes a special type of distribution (actually one
of the most important ones in science). It would be very useful to find out
about this, specially if you are thinking of doing any statistical analysis.

Cheers,

Gabriel