More Droste

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1467

G'Mic also has Frames > Droste

Original image is 'Puebla de Sanabria'. I used a Quincunial filter in MathMap and then G'Mic Droste Frames.
Droste Frames can give some jagged edges which I cleaned-up with the smudge tool.

Interesting that the G'Mic Continuous Droste filter is from MathMap?

sallyanne · **Posted:** Fri Dec 08, 2017 6:14 am **(#22)**

Tas_mania

Quote:

Interesting that the G'Mic Continuous Droste filter is from MathMap?

Hopefully many of the Mathmap filters will be coded into GMIC language. We were lucky that the CD was.

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1467

racer-x got me thinking about Droste animations after he uploaded a great example. I discovered something interesting that I didn't know......

Once you have done your Droste image you just need to rotate it and Droste does the rest. In this animation there is no zoom.
It's an astrological clock (Merry Xmas-Solstice).

I rotated it with G'Mic>Garage Coders Smart Rotation. How many degrees is up to you but you duplicate the last rotated layer and apply the same degrees to that before duplicating it and adding those degrees again. I used 12 degrees X 30 layers = 360 degrees.

Nidhogg · **Posted:** Sat Dec 09, 2017 7:45 am **(#24)**

Droste in fun.
G´mic continuous droste, rotate nLayer: 5 degrees 72 copies, all layers to image size.
Rename layers: (40ms), downscaled.

Something I was not aware of, you need to use "all layers to image size" before downscaling,
or it will shake weirdly and not look good. I guess it has something to do with the rotated layers going over the layer boundaries?

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1837

Another type of Droste....

Attachment:

droste2.jpg [ 730.56 KiB | Viewed 3011 times ]

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1467

Interesting, MathMap 'Animated Droste Whip' is just 'Continuous Droste' with another name.

It can render all frames in a single operation (not one frame at a time). I don't think that has been implemented in G'Mic Continuous Droste.
Also, you don't need to use "all layers to image size" or downscaling as Nidhogg recommends.

Prague Astronomical Clock With Droste Effect

If you use Droste Whip then G'Mic Continuous Droste default settings are a good place to start. 'External transparency' must be ticked and
I only changed 'inner radius' and 'start level' a bit. Test with the animation slider. I used racer-x's FFMPEG command to get under the Gimp Chat 5.2Mb upload limit.

Nidhogg · **Posted:** Sun Dec 10, 2017 4:47 pm **(#27)**

Interesting. Okay, I set no transparency, inner radius 45 looks good.
In settings tabs I have wrap in both, 25 frames animation. What am I supposed to do with the slider?
Tried out and it didn't look good.
Help needed thank you.

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1467

Hi Nidhogg,
The slider sets the end frame which then synchronises with the first frame. 'Period' should be ticked.
It's best if the frame number is a fraction of 360. I used 90 frames (4 degrees each) but for some reason I had to delete one.
I think it's because it's a continuum. I actually don't understand that aspect of it.
Cheers. :coolthup

Skinnyhouse · **Posted:** Mon Dec 11, 2017 9:48 am **(#29)**

Another old image re-drosted. I just like the way the colours appeared.

Attachment:

PlayOnWordsDrosteRound.png [ 1.43 MiB | Viewed 2976 times ]

jeremy82many · **Joined:** Feb 06, 2019 **Posts:** 4

Nidhogg wrote:

Droste in fun.
G´mic continuous droste, rotate nLayer: 5 degrees 72 copies, all layers to image size.
Rename layers: (40ms), downscaled.

Something I was not aware of, you need to use "all layers to image size" before downscaling,
or it will shake weirdly and not look good. I guess it has something to do with the rotated layers going over the layer boundaries?

[ Image ]

I'm new to GIMP and I downloaded it and was able to create some neat droste stills, but I would love to do an animation that loops infinitely like this.

I didn't see an "nLayer" setting in the G'MIC droste filter options - where can I find this?
Or is the instruction simply to create 72 identical layers, rotate each layer by 5 degrees and animate?

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1837

Here ya go...

Attachment:

droste.gif [ 1.87 MiB | Viewed 3136 times ]

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1467

Hi jeremy82many welcome to Gimp Chat.
You have asked a good question.

I think Nidhogg duplicated the original layer 72 times and then used Continuous Droste to rotate each layer 5 degrees more than the previous one (72 X 5 = 360) His series would have been 0,5,10,15,20 etc.

Your image is worth rotating but make sure it has equal height and width. If you are making an animated GIF then it's too big @ 1115px.

The advantage of MathMap is you can do it in one operation but MathMap has no windows support at present.

jeremy82many · **Joined:** Feb 06, 2019 **Posts:** 4

racer-x wrote:

Here ya go...

Attachment:

droste.gif

Fantastic! Can ya teach a brother how to fish?

How might I be able to achieve the same results?

jeremy82many · **Joined:** Feb 06, 2019 **Posts:** 4

Tas_mania wrote:

Hi jeremy82many welcome to Gimp Chat.
You have asked a good question.

I think Nidhogg duplicated the original layer 72 times and then used Continuous Droste to rotate each layer 5 degrees more than the previous one (72 X 5 = 360) His series would have been 0,5,10,15,20 etc.

Your image is worth rotating but make sure it has equal height and width. If you are making an animated GIF then it's too big @ 1115px.

The advantage of MathMap is you can do it in one operation but MathMap has no windows support at present.

Wonderful thanks, and yes I am limited to Windows at the moment. What is a good pixel size for animated GIF?

Nidhogg · **Posted:** Thu Feb 07, 2019 11:57 am **(#35)**

Yes my spiral had 72 layers (using 5 degree turns) which makes it smooth enough.
The image was done with Gmic droste, but the animation was done using "rotate nLayer" script.
It's a Gimp 2.8 script, I haven't used it on 2.10 yet, but it can be fixed for 2.10.

Wouldn't go higher than around 300x300 pixels with a gif animation that has lot of layers.
But it depends on your computer specs and other things.

Attached the 2.8 version of rotate nLayer script and Tin Tan's rename layers for animation plug-in.
I had to zip it, did not accept .py upload.
Don't know the max upload limit so I made the gif under 4mb.

1. Cropped to 1000x1000 square (your image wasn't square)
2. Scaled to 400x400
3. Rotate nLayer with the settings below.
4. Cropped to 240x240
5. Used Tin Tan's "rename layers for animation" to speed the animation (35ms per frame)
6. Filters/animation/optimize for gif.
7. Export as gif, remember to save as animation.

rich2005 · **Joined:** Mar 04, 2011 **Posts:** 2613

Tas_mania wrote:

Hi jeremy82many welcome to Gimp Chat.
...snip...The advantage of MathMap is you can do it in one operation but MathMap has no windows support at present.

It does just about work. I remember a fairly recent post by lylejk where he found a dark theme that showed the controls.

For anyone who likes a little dabble or experiment, MathMap is great fun.

The files you need here: https://www.dropbox.com/s/8h4je3h8oetfw ... p.zip?dl=0 5.6 MB

I took the 3, 32bit files out, they are already there in Gimp 2.10.8

A quick video on installation and setup https://youtu.be/ef6apvpa234 duration 4 minutes

jeremy82many · **Joined:** Feb 06, 2019 **Posts:** 4

Nidhogg wrote:

Yes my spiral had 72 layers (using 5 degree turns) which makes it smooth enough.
The image was done with Gmic droste, but the animation was done using "rotate nLayer" script.
It's a Gimp 2.8 script, I haven't used it on 2.10 yet, but it can be fixed for 2.10.

Wouldn't go higher than around 300x300 pixels with a gif animation that has lot of layers.
But it depends on your computer specs and other things.

Attached the 2.8 version of rotate nLayer script and Tin Tan's rename layers for animation plug-in.
I had to zip it, did not accept .py upload.
Don't know the max upload limit so I made the gif under 4mb.

1. Cropped to 1000x1000 square (your image wasn't square)
2. Scaled to 400x400
3. Rotate nLayer with the settings below.
4. Cropped to 240x240
5. Used Tin Tan's "rename layers for animation" to speed the animation (35ms per frame)
6. Filters/animation/optimize for gif.
7. Export as gif, remember to save as animation.

[ Image ]

[ Image ]

Thanks you so much for the steps! And the attachments. Seems do-able for beginner level user, will give it a try and report back.

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1467

I'm glad Nidhogg showed-up to explain it perfectly. BTW I had no idea the 'Land of 100,000 Lakes' is Manitoba.

'Seems do-able for beginner level user' Definitely. Unfortunately GIF is a limited format for presenting animations with many sites restricting file sizes on uploads.

Hi rich2005, good on you for making a short video on installing MathMap on Windows. I don't think that 32bit version has MathMap Composer. Composer lets you chain multiple filters together (node based) for some awesome results. Compiling the C source code from Linux to Windows has eluded me. I would rather be doing art than wrestling with a grossly over-obfuscated OS. I know a lot of obfuscation came from the relentless hacking attacks and trojans on Windows, but MS seemed to recognise Open Source a few decades too late.

Nidhogg · **Posted:** Thu Feb 07, 2019 11:17 pm **(#39)**

Tas_mania wrote:

BTW I had no idea the 'Land of 100,000 Lakes' is Manitoba.

Me neither. Finland is called Land of 100.000 lakes. They were formed during the ice age when the glaciers were moving.
I'm changing it because I might be the only Finn here! :hehe

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1467

Quote:

Finland is called Land of 100.000 lakes. They were formed during the ice age when the glaciers were moving.
I'm changing it because I might be the only Finn here! :hehe

Great you changed it. Looks like a lot of places want to be 'land of 100,000 lakes' but whose counting? :rofl

I always though Nidhogg was more Nordic than Canadian