is that pattern an artifact from a scanning process ?

http://25.media.tumblr.com/1899625d54de ... 2_1280.jpg

what technique could improve this image ?

What a strange pattern has that image.
I guess with some despeckle and smooth techniques, GIMP Despeckle, G'MIC Remove Hot Pixels and G'MIC Smooth anisotropic.
But I do not think it's possible to remove that pattern totally only using filters.
I do not see interlace distortions in the image,so deinterlace I do not think is useful. This pattern seems to be because the canvas where the image has been printed.

Edit:
Only with filters. Remove Hot Pixel, GIMP Despeckle, Smooth Anisotropic, very little Sharpen deblur

Hi Yafu, this filter (Remove Hot Pixel) has the G'mic?
That I do not know.v
I did a highlighted in color, then used the filters Despekle and (G'MIC) Smooth thin brush.

I think for a good result, the clone tool would need

@Akros, yes. Under Repair menu.

thanks Yafu and Akros

improving images is beyond my knowledge, you both clearly know your stuff

Just ran Ian's noise reduction on it. (Is in G'MIC)

Cool job guys. Mine looked a lot clearer before I uploaded it.

Used G'MIC Fourier Transform to remove the frequency noise (regular pattern noise), then one step of G'MIC anisotropic smoothing.

Good work on the photo, wouldn't know where to begin.

thanks sallyanne !


the direct transform gave me a strange all grey image as output and the inverse transform an error

Hi guys!
Where exactly is this filter (Fourier Transform) located?

great job Ronounours

G'MIC -> Spectral Filters -> Fourier Transform

Thx Esper!
But cant see the preview using that filter.

With option --> Transform Direct, the preview is transparent;
With the option Transform Inverse, No preview avaliable.

same here

The direct transform gave me a strange all grey image too, and changed the appearance of how layers are displayed in layers dialog.

yep

i guess Ronounours can solve that mystery

Happened to me too

I got some pretty good results by just using Repair>Smoothing - anisotropic with these settings.


Results-

To Esper,
Since no one said anything about the origin of the strange pattern:
It is not caused by scanning,on the contrary this is a good scanner.
The picture must have been from a glossy magazine or similar.
The machine that prints it uses this pattern to regulate the amount of printing ink.
Without it the colors would bleed.
Gerard.

Another quick way to get a reasonable image is gaussian blur 5, sharpen 60, duplicate the layer overlay mode 40 %, flatten and sharpen 60 , save as jpg