Posted by
karo03 on
Jul 09, 2007; 4:52pm
URL: http://imagej.273.s1.nabble.com/ImageJ-interaction-ROI-Manager-etc-tp3698918p3698920.html
Thank you Michael for explanations. Consider my questions as from a
newbie.
Am 09.07.2007 um 16:19 schrieb Michael Schmid:
> On 5 Jul 2007, at 09:41, Karsten Rodenacker wrote:
>
>> Using the ROI Manger with display, the numbers in the display
>> usually don't correspond with the numbers of the ROI's in the
>> list, at least after having deleted any object from the list. Is
>> that intended?
> Hmm, the rois are not numbered in the roi manager, but have names
> that relate to their y and x coordinates. The labels are the
> position in the list of rois and updated correctly, as far as I see
> (ImageJ 1.38v; maybe you have an earlier version?)
>
I mistook the first four character in the ROI list as number. I have
the current ImageJ version, that live updater is very helpful.
However, dealing with several hundred particles, it is cumbersome to
relate the displayed number with the respective ROI.
>> Using the Wand on a mask image clicking into the background will
>> select the next most connected object on the right. Is that intended?
> It has been like this since the early days of ImageJ and I think
> everyone is used to it by now, even though it is different from the
> Wand of other programs.
>
Ok, I did not trust my machine!
>> Having a list of objects in the ROI manager, I would like to
>> correct one selected, either cut it into two or change it and than
>> update it in the ROI manager. My quite complicated way was:
>> 1. Select the object
>> 2. Change the mask image by drawing, deleting, etc.
>> 3. Remove the selection
>> 4. Multiple object select by doWand with shift if there are more
>> than one object after correction
>> 5. Add the object(s) to ROI Manager
>> 6. Find the formerly selected object and delete it in the ROI list
>> Another again complicated method is:
>> 1. correct the mask image
>> 2. (re)run analyze particles...
>> 3. control the objects
>> 4. if necessary go to 1.
>> Is there any idea to improve this proceeding?
> What about this:
> 1. select all items in ROI manager
> 2. ROI Manager More>>Combine (may be slow with many particles)
> 3. Create Mask
> 4. correct whatever you like (draw, delete, fill)
> 5. run "Analyze Particles" on the mask
> 6. delete everything in the ROI Manager
> 7. ROI Manager More>>Add Particles
>
> 1.-3. is not needed in case you have the mask of all objects already.
Thank you, I tried that. This way is similar to applying analyze
particle... with appropriate options after mask correction.
Regards
Karsten