Re: [Gimp-user] Change background colour with GIMP 2.10.22

[Zoltán Kluik <numizmatikakz gmail com>]

Hi Liam,

I got it. First I need to select Image-->Crop to selection and after that
Image--> Crop to content.
I'm really appreciate Your help, you can made easy my feature photo
editing.. Thank You very much for it!

Regards, Zoltan

Zoltán Kluik <numizmatikakz gmail com> ezt írta (időpont: 2021. márc. 27.,
Szo, 0:31):

> Dear Lim,
>
> Wow, with this fuzzy tool it works excellent. You write so exactly and
> precise, also it is really very fast process. I was blind that I wanted to
> do only with foreground selection tool. This is better what You said
> I have only point 9 which is not working. When I do Image --> Crop to
> content or Zealous crop the GIMP said: Cannot crop because the image is
> already cropped to its content. (Here the background is white and on the
> picture there is only the coin.)
> Thank You for Your help in advance.
>
> Zoltan
>
> Liam R E Quin <liam holoweb net> ezt írta (időpont: 2021. márc. 26., P,
> 0:09):
>
> > On Thu, 2021-03-25 at 17:24 +0100, Zoltán Kluik wrote:
> > > Dear Liam,
> > >
> > > Yes, the image is in RGB colour 8 bit.
> > > What does it mean?
> >
> > Colour means as opposed to greyscale (just grey, no colur allowed).
> >
> > RGB means that any pixel can be in any colour, as opposed to indexed
> > which would mean a fixed list of colours
> >
> > 8-bit means  each of red,  green, blue (RGB) can take any whole number
> > value from 0 to 255 - this is appropriate for JPEG images for example.
> >
> > With the following image I did this:
> >
> > (1) open the image in gimp
> > (2) select the Fuzzy Select tool from the toolbox
> > (3) in Tool Options, make sure the threshold is good - i used 13. The
> > higher  this number ,the more the Fuzzy Select tool will select colours
> > that are not quite the one you click on.
> > (4) i clicked on the green background 9still with fuzzy select). This
> > selected eveything except the coin.
> > (5) i used select->grow to increase the selection by 2 pixels. This
> > makes sure that if e.g. there's a pet hair in the picture, it gets
> > selected out. But this also selects the edge of the coin, which we
> > don't  want.
> > (6) then, i did Select->shrinl and entered 1 pixel, to get back the
> > edge of the coin.
> > (7) Probably we don't want an ugly hard edge so i used Select->Feather
> > by 1.5 pixels to soften the edge of the selection.
> > (8) i did edit->cut (or Control-X), to remove the green. If you don't
> > have the default black and white colours selected in the two small
> > panels  under the toolbox, press d to reset them to defaults and then
> > do cut.
> > (9) then i did Image->Crop to Content, to get rid of the extra white
> > areas.
> > (10) finally i exported the image.
> >
> > This is much faster to do than to describe. Maybe ten seconds at most.
> >
> > Just before exporting ,i actually also used  Colours->Levelsand pressed
> > Auto Input Levels; you may not want that; it makes the dark  parts of
> > the image black. You can get a better result by including a photo card
> > (you can get them on ebay or from any photography shop) in the picture
> > and using the white and the black as white and black points in Levels.
> > It's pretty  much instant although then you have to crop the photo card
> > out of the picture.
> >
> > Interesting coin.
> >
> > slave liam (ankh)
> >
> >
> > >
> >
> > --
> > Liam Quin - web slave for https://www.fromoldbooks.org/
> > with fabulous vintage art and fascinating texts to read.
> > Click here to have the slave beaten.