Re: Scale bar macro problems

Posted by Ben Tupper on Sep 04, 2008; 5:04pm
URL: http://imagej.273.s1.nabble.com/Scale-bar-macro-problems-tp3695175p3695178.html

Hi,

On Sep 4, 2008, at 11:01 AM, Nick Holway wrote:

> Hi,
>
> Thanks for the response.I followed your suggestion and it worked to  
> solve
> the image bar width problem. I didn't realise that it was called  
> for each
> image and had kept outside of the loop to try and make the script more
> efficient.
>

You can set the scale to be global so it applies to all images...

run("Set Scale...", "distance=0 known=1 pixel=1 unit=cm global");


That should behave as you desire - set it once and keep it out of the  
loop.

Cheers,
Ben

> I noticed when running the script that the "no images open" message  
> actually
> occured when it tried to process the thumbs.db file. The fact I had no
> images open was a red herring. I'll alter my script so it'll only open
> images.
>
> Nick
>
> 2008/9/4 Michael Schmid <[hidden email]>
>
>> Hi Nick,
>>
>> in your macro, the "Set Scale..." command is called before
>> opening the image, so it will create an error if there is no
>> open image at that time.
>> You should call it each time after you open an image.
>>
>> Tiff images have the image scale stored as tags with the image,
>> which might cause a scale different from that of the jpegs.
>> Again, this problem should be none if you call "Set Scale..."
>> after "open".
>>
>> Michael
>> ________________________________________________________________
>> Michael Schmid                    email: [hidden email]
>> Institut fuer Allgemeine Physik, Technische Universitaet Wien
>> Wiedner Hauptstr. 8-10/134, A 1040 Wien, Austria
>> Tel. [phone] or -13453, Fax [phone]
>> ________________________________________________________________
>>
>> On 4 Sep 2008, at 16:04, Nick Holway wrote:
>>
>>  Hi,
>>>
>>> I'm trying to write a macro which puts a scale bar on all the  
>>> images in a
>>> directory. I've borrowed bits from the Bacth Convert macro.
>>>
>>> run("Set Scale...", "distance=1 known=1 pixel=1 unit=um");
>>> dir1 = "C:\\imagejdev\\original\\";
>>> dir2 = "C:\\imagejdev\\output\\";
>>>  list = getFileList(dir1);
>>>  setBatchMode(true);
>>>  for (i=0; i<list.length; i++) {
>>>  showProgress(i+1, list.length);
>>>  open(dir1+list[i]);
>>> run("Scale Bar...", "width=100 height=5 font=18 color=Black
>>> background=None
>>> location=[Lower Right] bold");
>>>  saveAs("TIFF", dir2+list[i]);
>>>  close();
>>>  }
>>>
>>> I have a couple of problems with this:
>>>
>>> * If there is no image open, then a dialog warns you of this
>>>
>>> * If the macro opens a JPEG then the scrip works properly, if it  
>>> opens a
>>> tif
>>> then the scale line extends from the LHS of the image to the RHS  
>>> of where
>>> it
>>> should end
>>>
>>> I'm using the v1.41 of the MBF build on Windows XP SP2 and I also  
>>> tried
>>> Imagej 1.41 with the MBF plugins on Centos 5.2. I had the same  
>>> problems on
>>> both platforms. FWIW the files were originally created under  
>>> Windows.
>>>
>>> Does anyone know how to get around these problems?
>>>
>>> Thanks
>>>
>>> Nick
>>>
>>

Ben Tupper
[hidden email]

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