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 Post subject: Diorama effect
PostPosted: Wed Aug 11, 2010 5:32 am  (#1) 
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Does this look remotely like a diorama effect?

After scaling I noticed that there was some weird pixelization (sp?) going on. Ignore that. Not sure how it happened. The point is that I want to know if the effect works or if I need to work on it more and if so, does anyone have any pointers?

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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 6:14 am  (#2) 
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Jolie wrote:
Does this look remotely like a diorama effect?


I know a tilt-shift effect that may look similar (see https://secure.wikimedia.org/wikipedia/ ... Tilt_shift )

Humm..not sure even ignoring the weird pixelation

the blurred area look to me too simmetrical (i.e. i would expect some difference in the blur between a car blurred because too close and one blurred because too far )and the transition too sharp (Well i can't see any transition but a sudden change)

I am not a big fan of the tilt shift effect, anyway i believe smoother transition ((maybe using a layermask...well to be exact will be needed a depth mask) will add more depth and make look more..natural the effect

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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 7:31 am  (#3) 
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The amount of focus needs to be dependent upon the relative distance of the objects in the image from the camera. For example, the person on the left is the same distance from the camera as the adjacent white car, yet the car is in focus. By the same token, the large sign is not so far from the camera as the tunnel itself, and thus should be more in focus.

Here is a crude attempt at blurring the objects based the perceived distance (I wish GIMP had a Bokeh blur plug-in):
Attachment:
diorama.jpg
diorama.jpg [ 94.18 KiB | Viewed 4691 times ]

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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 7:40 am  (#4) 
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Thanks PC. I'll look into the tilt-shift effect. See if I can get some pointers from that article too.

Thanks saulgoode. Good tips about the camera focus. Maybe higher up, where the sign is, is further away from the camera focus as well, because your crude attempt doesn't really look miniature either. :?

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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 10:45 am  (#5) 
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Here is an interesting tilt-shift tutorial.

Link

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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 12:38 pm  (#6) 
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Thank you. :) I'm gonna try that tutorial. Got the focus blur plug-in mentioned there as well. See what it does.

http://www.registry.gimp.org/node/8236 < Windows plug-in

http://registry.gimp.org/node/1444 < Linux plug-in

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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 1:21 pm  (#7) 
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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 1:34 pm  (#8) 
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I like that one better than your first one.

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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 2:04 pm  (#9) 
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I just tried with the photo that earth2marsh from flickr used and I can get it right there. I think it's important to get an image that is zoomed out correctly. I'll look for one tomorrow. :)

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 Post subject: Re: Diorama effect
PostPosted: Wed Aug 11, 2010 3:03 pm  (#10) 
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The second is blurred way too much in my opinion. Also it has only a very very small focus area. Saul's pic looks better in these points.


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 Post subject: Re: Diorama effect
PostPosted: Thu Aug 12, 2010 12:49 am  (#11) 
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I had written up a fairly detailed tutorial on tilt shift with the focal blur plugin:
http://www.silent9.com/blog/archives/15 ... -Gimp.html

hth.

Quote:
(I wish GIMP had a Bokeh blur plug-in)

The lens blur plugin supports this. It is referred to as "shine" and it can be tied to a predefined shape or a brush. The size of the bokeh depends on how out of focus the image is.

Here is an example on a picture of xmas lights I had, using a parameteric 5 sided brush:
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 Post subject: Re: Diorama effect
PostPosted: Thu Aug 12, 2010 3:25 am  (#12) 
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Rolf has done a couple of episodes of Meet The Gimp on fake tilt-shift using the focus blur plug-in:

Episode 095: Shrinking! (1)

Episode 097: Shrinking! (2)

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 Post subject: Re: Diorama effect
PostPosted: Thu Aug 12, 2010 4:19 am  (#13) 
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Wow, thanks guys. I got lots more help then I could have hoped for. :mrgreen:

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 Post subject: Re: Diorama effect
PostPosted: Thu Aug 12, 2010 8:16 am  (#14) 
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paynekj wrote:
Rolf has done a couple of episodes of Meet The Gimp on fake tilt-shift using the focus blur plug-in:

Episode 095: Shrinking! (1)

Episode 097: Shrinking! (2)



I wish he would get moved in and settled in so he could get back to the immportant business of making tuts for US.

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 Post subject: Re: Diorama effect
PostPosted: Thu Aug 12, 2010 9:26 am  (#15) 
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RobA, thanks for pointing that out. Just what I've been looking for for years (and failed to implement myself the time I tried). Since the GIMP wiki link on your website is presently dead, here is the link to the plug-in author's page: http://sudakyo.hp.infoseek.co.jp/gimp/fblur/focusblur_e.html

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 Post subject: Re: Diorama effect
PostPosted: Fri Aug 13, 2010 11:14 am  (#16) 
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A very interesting tutorial on this can be found here.

http://gimp-tutorials.net/Creating-Dior ... p-tutorial

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 Post subject: Re: Diorama effect
PostPosted: Fri Aug 13, 2010 1:59 pm  (#17) 
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I ran this tutorial and got pretty nice results.

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 Post subject: Re: Diorama effect
PostPosted: Fri Aug 13, 2010 2:07 pm  (#18) 
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Here is your image with the same tutorial except i feathered by 100 instead of 400.

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 Post subject: Re: Diorama effect
PostPosted: Mon Aug 16, 2010 3:07 pm  (#19) 
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saulgoode wrote:
RobA, thanks for pointing that out. Just what I've been looking for for years (and failed to implement myself the time I tried). Since the GIMP wiki link on your website is presently dead, here is the link to the plug-in author's page: http://sudakyo.hp.infoseek.co.jp/gimp/fblur/focusblur_e.html


Thanks for the updated link!

-Rob A>

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