modification to the BackgroundSubtracter class

[Ben Liu-3]

Hi there,
I modified the BackgroundSubtracter class by adding one method:
        public void setWhiteBackground(boolean b) { whiteBackground = b; }
and delete: package ij.plugin.filter; changed its name to BackgroundSubtracterM.java; Then I saved to plugin folder.

I used in a plugin as:
            BackgroundSubtracterM bgs = new BackgroundSubtracterM();
            bgs.setWhiteBackground(false);
            bgs.subtractBackround(ip, 50);


D:\Program Files\ImageJ\plugins\ALM\BackgroundSubtracterM.java:23: Interface PlugInFilter of class BackgroundSubtracterM not found.
public class BackgroundSubtracterM implements PlugInFilter {

But it does not happen if  I use the  original  class:
            BackgroundSubtracter bgs = new BackgroundSubtracter();
             ///bgs.setWhiteBackground(false);
             bgs.subtractBackround(ip, 50);

What is wrong with my modification?
Thanks.
Bian


               
---------------------------------
Love cheap thrills? Enjoy PC-to-Phone  calls to 30+ countries for just 2¢/min with Yahoo! Messenger with Voice.

[Dimiter Prodanov]

Hi, with these modifications you should have saved the class under
ij/plugin/filter in the directory tree of ImageJ
Isn't it more simple instead of modyfing the source just to inherit the
BackgroundSubtracter ?

best regards

Dr Dimiter Prodanov, PhD

>------------------------------
>
>Date:    Sat, 29 Apr 2006 17:44:30 -0700
>From:    Ben Liu <[hidden email]>
>Subject: modification to the BackgroundSubtracter class
>
>Hi there,
>I modified the BackgroundSubtracter class by adding one method:
>         public void setWhiteBackground(boolean b) { whiteBackground = b; }
>and delete: package ij.plugin.filter; changed
>its name to BackgroundSubtracterM.java; Then I saved to plugin folder.
>
>I used in a plugin as:
>             BackgroundSubtracterM bgs = new BackgroundSubtracterM();
>             bgs.setWhiteBackground(false);
>             bgs.subtractBackround(ip, 50);
>
>
>D:\Program
>Files\ImageJ\plugins\ALM\BackgroundSubtracterM.java:23:
>Interface PlugInFilter of class BackgroundSubtracterM not found.
>public class BackgroundSubtracterM implements PlugInFilter {
>
>But it does not happen if  I use the  original  class:
>             BackgroundSubtracter bgs = new BackgroundSubtracter();
>              ///bgs.setWhiteBackground(false);
>              bgs.subtractBackround(ip, 50);
>
>What is wrong with my modification?
>Thanks.
>Bian
>
>
>
>---------------------------------
>Love cheap thrills? Enjoy PC-to-Phone  calls to
>30+ countries for just 2¢/min with Yahoo! Messenger with Voice.
>
>------------------------------
>
>End of IMAGEJ Digest - 28 Apr 2006 to 29 Apr 2006 (#2006-118)
>*************************************************************

[Wayne Rasband]

When removing "package ij.plugin.filter;" to convert a built in  
plugin to a user plugin you have to replace it with "import  
ij.plugin.filter.PlugInFilter;" or the compiler will not be able to  
find the PlugInFilter interface.

-wayne

On Apr 29, 2006, at 8:44 PM, Ben Liu wrote:

> Hi there,
> I modified the BackgroundSubtracter class by adding one method:
>         public void setWhiteBackground(boolean b) { whiteBackground  
> = b; }
> and delete: package ij.plugin.filter; changed its name to  
> BackgroundSubtracterM.java; Then I saved to plugin folder.
>
> I used in a plugin as:
>             BackgroundSubtracterM bgs = new BackgroundSubtracterM();
>             bgs.setWhiteBackground(false);
>             bgs.subtractBackround(ip, 50);
>
>
> D:\Program Files\ImageJ\plugins\ALM\BackgroundSubtracterM.java:23:  
> Interface PlugInFilter of class BackgroundSubtracterM not found.
> public class BackgroundSubtracterM implements PlugInFilter {
>
> But it does not happen if  I use the  original  class:
>             BackgroundSubtracter bgs = new BackgroundSubtracter();
>              ///bgs.setWhiteBackground(false);
>              bgs.subtractBackround(ip, 50);
>
> What is wrong with my modification?
> Thanks.
> Bian
>
>
>
> ---------------------------------
> Love cheap thrills? Enjoy PC-to-Phone  calls to 30+ countries for  
> just 2¢/min with Yahoo! Messenger with Voice.

[Ben Liu-3]

Hi Dimiter Prodanov,

You mean I shoudl put it into the filter directory of IJ.jar file?

Actually, I wanna inherit the BackgroundSubtracter class, but I don't know how to.
I mean, the whiteBackground in BackgroundSubtracter is a private one,
how can I access it in its subclass ? Or do you have any way?

Thanks.

Best wishes,
Bian Liu
======= 2006-04-30 06:34:39：=======

>Hi, with these modifications you should have saved the class under
>ij/plugin/filter in the directory tree of ImageJ
>Isn't it more simple instead of modyfing the source just to inherit the
>BackgroundSubtracter ?
>
>best regards
>
>Dr Dimiter Prodanov, PhD
>
>
>>------------------------------
>>
>>Date:    Sat, 29 Apr 2006 17:44:30 -0700
>>From:    Ben Liu <[hidden email]>
>>Subject: modification to the BackgroundSubtracter class
>>
>>Hi there,
>>I modified the BackgroundSubtracter class by adding one method:
>>         public void setWhiteBackground(boolean b) { whiteBackground = b; }
>>and delete: package ij.plugin.filter; changed
>>its name to BackgroundSubtracterM.java; Then I saved to plugin folder.
>>
>>I used in a plugin as:
>>             BackgroundSubtracterM bgs = new BackgroundSubtracterM();
>>             bgs.setWhiteBackground(false);
>>             bgs.subtractBackround(ip, 50);
>>
>>
>>D:\Program
>>Files\ImageJ\plugins\ALM\BackgroundSubtracterM.java:23:
>>Interface PlugInFilter of class BackgroundSubtracterM not found.
>>public class BackgroundSubtracterM implements PlugInFilter {
>>
>>But it does not happen if  I use the  original  class:
>>             BackgroundSubtracter bgs = new BackgroundSubtracter();
>>              ///bgs.setWhiteBackground(false);
>>              bgs.subtractBackround(ip, 50);
>>
>>What is wrong with my modification?
>>Thanks.
>>Bian
>>
>>
>>
>>---------------------------------
>>Love cheap thrills? Enjoy PC-to-Phone  calls to
>>30+ countries for just 2?min with Yahoo! Messenger with Voice.
>>
>>------------------------------
>>
>>End of IMAGEJ Digest - 28 Apr 2006 to 29 Apr 2006 (#2006-118)
>>*************************************************************
>.

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