Re: [Gimp-user] Single pixel selection

[Ofnuts <ofnuts gmx com>]

If you problem is getting rid of isolated pixels, then:

- Start quickmask
- Filter>Generic>Erode will remove all isolated pixels
- Filter>Generic>Dilate will more or less restore the previous selection 
(without the isolated pixels)
- Exit quickmask

Slightly more complex, but more powerful:

- Select>To path. Small islands oif pixels will create small path strokes
- use ofn-path-filter-strokes to remove the small strokes (several 
criteria available: length of perimeter, area...)
- Select>From path will recreate more or less the same selection, 
without the small bits, for more accuracy
- Select>Grow that selet by one pixel
- Intersect with the initial selection (this assumes you saved it first)

ofn-path-filter-strokes is available here: 
https://sourceforge.net/projects/gimp-path-tools/files/scripts/



On 06/28/18 10:41, moon wrote:
> Hello.
>
> When editing drawings, I often need to select specific areas to colorize or
> copy.
> I do this with combination of tools like "Free select", "Fuzzy select" & "Select
> by color".
>
> Often though there are individual pixels of varying colors scattered about that
> require being added or removed from the selection.
>
> The QuickMask is not so useful because the red color means I can't easily
> distinguish the pixels I am interested in.. I have to turn off the QuickMask to
> identify the pixel, turn it on to (de)select it etc.
>
> I've played with the QuickMask opacity and color, but it doesn't really help
> since typically these pixels are very close in color to the selection &
> background.
>
> I've tried a fixed size 1x1 Rectangular Select Tool, but this is clumsy since
> you have to drag to get the selection to start.
>
> It's also clumsy using the Free select tool to lasso a single pixel.
>
> Anything else I could try?
>
> If not, I will try to write a python plugin. I'm thinking of basing it on a
> fixed 1x1 Rectangular Select Tool... does this sound feasible/sensible?
>
> Cheers,
> Moon