Hi Nariman,
maybe like your camera software provides a spatial calibration that
is present in the file?
See the Image>Info; you will then see, e.g., 'Resolution: 72 pixels
per inch'
If the image has a spatial calibration, you should also see scaled
units instead of pixels in the status line while movint the cursor
over the image (e.g. x=4.5, y=5.5).
Michael
________________________________________________________________
On 5 Jun 2010, at 15:26, Nariman wrote:
> Hello,
>
> Indeed, during my work, I want to calculate the surface of the
> particles
> that were detected.
> I don't have a scale bar for the images, so I'm working with pixels
> unit.
> When I measure the area I get numbers such as 0.0015 or 10.45 and
> so on, I
> want to say they aren't integer, they are float.
> So they aren't the number of pixels? Or Imagej has defined a
> proposed unit
> for my measurments?
> If yes, someone may tell me how the unit was defined in imagej? I
> need it to
> estimate my measurements..
>
> Thank you Chris and thanks in advance to all of you.
> Best wishes,
> Nariman