Scale is SOMETIMES lost during import

Hi together,

I’ve encountered a problem when I try to import a set of images.

To reproduce please download the following two images:

Now apply File -> Import -> Image Sequence and check “Use Virtual
Stack”. The data is correctly scaled to 0.66 x 0.66 µm.

Now apply File -> Import -> Image Sequence again but do not check “Use
Virtual Stack”. Now the scale is lost.

If you delete L’45AA7.tif the data will be correctly imported with the
second approach as well.

Did I found a bug?

I’ve crossposted it on the mailing list and @anon96376101 was able to reproduce the problem.

@Wayne : Any idea?


This bug is fixed in the latest ImageJ daily build (1.51h12). Units are converted from cm to µm when the pixel width is less than 0.0001 cm. Earlier versions of ImageJ only did this conversion when importing a sequence of images as a virtual stack.

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