> Dear Group,
>
> I have a problem and I don´t know if I made an error in reasoning or
> ...
> I have the Version 1.35b using java 1.5.0-beta2.
This bug is fixed in ImageJ 1.35r, available at
<
http://rsb.info.nih.gov/ij/notes.html>. Earlier versions of ImageJ
would sometimes generate an incorrect scale when you changed units
(e.g., "inch" to "cm") in the Image>Properties dialog.
-wayne
>
> I have an image
>
> with the following parameter (from the Info window)
> Title: 007266.tif
> Width: 2.57 inches (2058)
> Height: 3.73 inches (2984)
> Resolution: 800 pixels per inch
> Bits per pixel: 8 (grayscale LUT)
> No Threshold
> Magnification: 0.25
> Uncalibrated
> +++++++++++++++++++++++++++++++++
>
> I want to measure in cm so I set "Unit of Length" in the
> properties window to cm.
> looking in Info again gives
>
> Title: 007266.tif
> Width: 6.59 cm (2058)
> Height: 9.55 cm (2984)
> Resolution: 312.50 pixels per cm
> Bits per pixel: 8 (grayscale LUT)
> No Threshold
> Magnification: 0.25
> Uncalibrated
>
> But! (when calculating by myself taking 2.54 cm = 1 inch)
>
> shouldn´t the values be like (not rounded)
> Width: 6.5278 cm
> Height: 9.4742 cm
> Resolution 314.9606 (if 800/2.54)
>
> Even when rounding to two digits I get other values than ImageJ.
> When dividing the total pixels through the width in cm the
> values will not fit either.
> It seems like a fairly large rounding error to me.
>
> So can someone tell me if I do something wrong or is it a bug.
> Or will ImageJ calculate correctly when I use "Set scale" and
> enter 314.7 pixel equals 1 cm
>
> Thank you all very much in advance
>
> Cheers
> robert
>
>
>
>
>
>
>
Locked
