Once was a series of filters to easy the creation of seamless pattern, the series was called "simple" and were really simple filters, simple but cool

One, maybe the most simple ,called "Centre Tile", with no dialogues at all, was my favourite because the originality of the effect

Nowadays the "Simple" filter page is dead, and i miss that little simple filter, so i tried to recreate the effect with gmic

As you may guess from the name is a pattern filter , and will derive patterns from the image centre

CENTRE TILER FOR GMIC

Apparently here there are far too much controls for a "simple " filter



BUT there is only 1 relevant option, the first , that determine how large should be the centre , how much of the original image will be used



the filter will mirror the central image along all axes
and this is already sufficient most of the times to create nice seamless pattern .

BEFORE : sample image i used was already a pattern, BUT it was a coincidence not relevant
WHAT is relevant is what the filter does , note the central part of this image



AFTER : The new seamless pattern derived from the central motive of the previous image



This is the essential function of the filter , controlled by the first slider



About the other controls , here below , they correspond to that of a built in filter (gmic>arrays and Frames> Mirror Array )



They may be useful here
1)
to guarantee the final image seamless ( in rare cases where the first mirroring was not sufficient to make seamless , for sure a second will solve)

and/or
2)
to extend the pattern size without loosing quality

and/or
to modify the reflection creating new "seeds" by cropping and/or offsetting

Waiting feedback... as example :
to determine "centre" size you prefer width/height locked, and a single slider to control both, as now or you would like more separate controls for Height and Width ?


As now i can't upload this directly to my source (i forgot PW ) so f you want try you should copy and paste (paste in your "gmic" file ..)

CREDIT

thank to Iain Ferguson , not sure if i could have solved without his code snippet , see http://www.flickr.com/groups/gmic/discu ... 087366706/

THE FILTER CODE

UPDATE COMING !!

Very often the default create seamless images, but what if not ?
Well may even be better , i need a example to clear

As example this below, it is not seamless and far to large for a pattern


gmic prentation by PhotoComiX, on Flickr

i added guides to simulate the median axes , and separate the 4 sectors, and show that each sector is different and seamless

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So i want add a "Split & Export sectors" option

Still i didn't find the pw to upload , if impatient use the code in the first message