Posted by
PEARSON Matthew on
URL: http://imagej.273.s1.nabble.com/Selection-brush-tool-usage-tp5017711p5017787.html
Hi Michael,
Sorry for the delay in replying to you, i have the imagej posts filtering into a separate folder in my email client but sometimes they go straight to my main inbox instead and i don't seem to be able to keep track of both locations at the same time! I had one from Wayne hiding there too and have apologised to him.
You raised some good points here so glad i found your email in the end! The key aspect for me is this:
So you can create a selection, press 'b' and then deselect all (shift-A).
I wasn't expecting to have to press shift-A to allow the selection brush to paint a new selection elsewhere. What i have been doing is adding a selection but ensuring that it is not just a single click but i click and hold and paint an area larger than the width of the selection brush itself, then when i press b the selection brush isn't in repair mode and i can paint a new selection elsewhere. But i like your suggestion of making a shortcut key to add the overlay and select none. Is there anyway to make this work without having to install this mini macro or adding to the startup macros, i.e. initialise it within my analysis macro somehow? The only reason i ask is because anyone using my macro would possibly do it on their own computer so they would have to make sure they had the shortcut macro setup before running.
I'm guessing the macro would look something like below:
macro "Add Overlay [o]" {
run("Add Selection…");
run("Select None");
}
Thanks,
Matt
--
Matt Pearson
Microscopy Facility
MRC Human Genetics Unit
Institute of Genetics and Molecular Medicine (IGMM)
University of Edinburgh
Crewe Road
EH4 2XU
On 8 Dec 2016, at 18:10, Michael Schmid <
[hidden email]<mailto:
[hidden email]>> wrote:
Hi Matt,
according to my understanding, the selection brush is mainly meant as a 'repair selection' brush.
If there is no selection, it creates one.
If there is a selection:
If you start brushing outside the current selection, it is in 'remove from selection' mode, and you can use it to remove a few pixels from the margin of the selection (because the selection was a bit too large).
If you start inside the current selection, it adds to the selection, e.g. if you want to extend the borders a bit.
You can force the behavior with the SHIFT (add) and ALT (subtract) modifier keys.
I am not aware of a possibility to have the selection brush delete the old selection and create a new one.
So you can create a selection, press 'b' and then deselect all (shift-A). Then add a new brush point. For convenience, you could have the 'add to overlay' and 'deselect' in a macro with a shortcut.
Alternatively, use the Overlay brush.
Michael
_______________________________________________________________________________
On 2016-12-08 10:15, PEARSON Matthew wrote:
Hi all,
I think i have cracked my problem with the selection brush and in fact
realise i'd asked a similar question a couple of years ago but then
didn't pursue the idea. I can now get the selection brush to create
selections around the image but the work flow for doing this seems a
little strange. These are the steps that work for me:
1.) Left click on the image to create a circular selection with the
selection brush
2.) Left click again anywhere on the image but not on the circular selection
3.) Press the b key (adds the first selection to the overlay i believe)
4.) I can now left click and add another circular selection on the image
5.) Repeat above for all selections then
5.) Image>Overlay>To ROI Manager (adds all the overlays as separate roi's)
I'm not sure why i have to do step 2.) before i press b. Its not a
big deal but would be good if you could just left click on the next
area, perhaps there is good reason for this.
Thanks,
Matt
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