Horizons

[johnnywyoming]

Ist time here.
Looking at GIMP to supplement DXO PhotoLab. I am starting to do some long exposure "Fine Art" photography and want to know if GIMP can remove horizons? Photo Lab does not do that of course and I have Photoshop CS4 available on my laptop but GIMP sounds promising overall.

[denzjos]

It would be helpful if you post an example photo and explain what you mean by removing the horizon.

[johnnywyoming]

I do not have any samples of my own. I could link you to a Youtube video but basically it is blending the sky and ocean where they meet at the horizon; so the horizon disappears.

[sallyanne]

Here is my rough attempt with heal brush

[rich2005]

(Yesterday, 09:25 PM)johnnywyoming Wrote: I do not have any samples of my own. I could link you to a Youtube video but basically it is blending the sky and ocean where they meet at the horizon; so the horizon disappears.

It is going to very much depend on the image.  You could try the gimp_gmic_qt plugin, the blend seamless filter. http://www.gmic.eu

Not a wonderful result, but reasonably quick for a largish image.
(1) Select the sky above the horizon. Copy and then paste puts as a new layer in Gimp 3. Kill the selection, Selct -> None.
(2) Use the move tool to "nudge" that layer to cover the horizon.
(3) The gmic plugin and blend
(4) The result, not great, I could probably get a better result if I tweaked the overlap layer a bit to give a better fit with the background.