getAutoThreshold

[Jjonthelin]

Hi everyone, I'm new to using ImageJ, and I'm trying to write a macro that will apply the same threshold to all the pictures within one folder.  I want the macro to first go through each image and collect threshold values generated by AutoThreshold.  The macro should then take the average threshold value and apply it to all of the images.  The main snag that I'm running into is how to use getAutoThreshold() function.  

x = getAutoThreshold();

What else do I need to add to that statement?  

[dscho]

Hi,

On Tue, 28 Jul 2009, Jjonthelin wrote:

> Hi everyone, I'm new to using ImageJ, and I'm trying to write a macro
> that will apply the same threshold to all the pictures within one
> folder.  I want the macro to first go through each image and collect
> threshold values generated by AutoThreshold.  The macro should then take
> the average threshold value and apply it to all of the images.  The main
> snag that I'm running into is how to use getAutoThreshold() function.
>
> x = getAutoThreshold();
>
> What else do I need to add to that statement?  

You might be interested in reading this tutorial:

http://pacific.mpi-cbg.de/wiki/index.php/How_to_apply_a_common_operation_to_a_complete_directory

Hth,
Dscho

[Gabriel Landini]

On Tuesday 28 July 2009  09:16:29 Jjonthelin wrote:

> Hi everyone, I'm new to using ImageJ, and I'm trying to write a macro that
> will apply the same threshold to all the pictures within one folder.  I want
> the macro to first go through each image and collect threshold values
> generated by AutoThreshold.  The macro should then take the average
> threshold value and apply it to all of the images.  The main snag that I'm
> running into is how to use getAutoThreshold() function.  
>
> x = getAutoThreshold();
>
> What else do I need to add to that statement?  

You need to read the macro functions supported by ImageJ.

http://rsb.info.nih.gov/ij/developer/macro/functions.html#getThreshold

G