http://imagej.273.s1.nabble.com/Saving-and-reloading-FFT-tp5009594p5009734.html
site into /opt. This gave me 1.48v which could save and read in the TIFF
> Dear Divakar,
>
> Try the current version of ImageJ (1.49h). You can upgrade using the Help>Update ImageJ command. If upgrading does not fix the problem, send me a sample image that I can use to reproduce it.
>
> Best regards,
>
> -wayne
>
> On Sep 22, 2014, at 10:02 PM, Divakar Ramachandran wrote:
>
>> On Tuesday 23 September 2014 06:23 AM, Rasband, Wayne (NIH/NIMH) [E] wrote:
>>> On Sep 22, 2014, at 8:12 PM, Divakar Ramachandran wrote:
>>>
>>>> On Friday 12 September 2014 02:35 AM, Zack Gainsforth wrote:
>>>>> Hi All,
>>>>>
>>>>> When I take an FFT of an image, it is obviously using reciprocal space coordinates. However, if I save that FFT to a tif and then reload it later, it loses the reciprocal space and reports the units incorrectly as direct space. Is there a way to set an image back into reciprocal space? I tried, for example, Analyze->Set Scale... Unit of length = nm/c, or changing the distance in pixels from 17.6 to 1/17.6. Better yet, it should retain that info when I save the image.
>>>>>
>>>>> Any ideas?
>>>> I have been eagerly awaiting a response to this. A few years ago I had
>>>> asked a related question about how electron diffraction patterns could
>>>> be scaled in reciprocal units. The response at that time was that it was
>>>> required to set a property, that was not accessible through the macro
>>>> language. Is there a solution now? If the info could be retained when
>>>> saved as TIFF, it would help a lot.
>>> What version of ImageJ are you using? With version 1.48g and later, File>Save As>Tiff and File>Save As>ZIP save the FFT data of FFT windows, except for FFTs of RGB images.
>>>
>>> -wayne
>>> --
>>> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html>> I am using 1.48k installed from the Ubuntu 14.04 LTS 64-bit repsitory.
>> When I open a TIA ser file (HRSTEM image recorded on a Tecnai TEM) with
>> the TIA plug-in, scale info is correctly available. Process -> FFT gives
>> a spectrum in which the correct reciprocal distances are displayed in
>> the status bar in nm units, as the mouse cursor is moved across the
>> image. When I use Save As TIFF, close the FFT spectrum and re-read it
>> in, the info at the top of the image is shown with "26.75x26.75 nm
>> (512x512)" text suggesting that scale info was read from the file;
>> however, only pixel units are displayed in the status bar as I move
>> mouse across the FFT spectrum.
>>
>> Divakar
>>
>> --
>> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html