POV-Ray : Newsgroups : povray.binaries.images : Experimental tonemapping tests Server Time
28 Apr 2024 10:50:41 EDT (-0400)
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From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 12 Apr 2016 03:00:45
Message: <570c9d1d$1@news.povray.org>
El 12/04/16 a las 00:51, dick balaska escribió:
> This is indeed amazing. (I'm dreaming of an animation where the hair
> on the film moves).

   Thanks! I'm sorry but the hair doesn't move on that footage. Here is
one that looks better (tough still no moving hair there):

https://www.youtube.com/watch?v=LK5mXWKj5Ks&nohtml5=False

   It should be easy to use it with the new tonemapping feature to give
an "old look" to your animations.

> But ... who keeps a wooden hourglass on a concrete floor??

   No one... this was just an old test scene for the hourglass I was
modeling with Wings3D, which I never used on an actual scene.

--
jaime


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From: Simon J  Cambridge
Subject: Re: Experimental tonemapping tests
Date: 12 Apr 2016 07:45:01
Message: <web.570cdf8d627d71513b8353c40@news.povray.org>
I can imagine all sorts of uses for this. Looks really good. (And as to why the
egg timer is on concrete, clearly it is the concrete itself that is being timed
here. You can never tell with concrete.)

Is there any appreciable time penalty at all? (I am thinking of animations in
particular.)


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From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 12 Apr 2016 08:55:02
Message: <570cf026$1@news.povray.org>

> Is there any appreciable time penalty at all? (I am thinking of animations in
> particular.)

   On that one, not even half a second more than the original.

--
jaime


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From: BayashiPascal
Subject: Re: Experimental tonemapping tests
Date: 13 Apr 2016 12:00:01
Message: <web.570e6cf2627d71516e89f5aa0@news.povray.org>
Very interesting new feature !

Jaime Vives Piqueres <jai### [at] ignoranciaorg> wrote:
> First the original (a simple hourglass I had lying around).
>
> --
> jaime


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From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 14 Apr 2016 11:43:11
Message: <570fba8f@news.povray.org>
You know you have been raytracing for too long... when your old renders
are old and worn.

Here I'm using screen.inc combined with the tonemapping feature to make
"vintage" versions of my old renders. It works pretty well on
photographs too... if your family photos are too well preserved, this is
a good solution. ;)

--
jaime


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Attachments:
Download 'the-kitchen-aged.jpg' (105 KB) Download 'fruits-bowl-aged.jpg' (109 KB)

Preview of image 'the-kitchen-aged.jpg'
the-kitchen-aged.jpg

Preview of image 'fruits-bowl-aged.jpg'
fruits-bowl-aged.jpg


 

From: Stephen
Subject: Re: Experimental tonemapping tests
Date: 14 Apr 2016 12:43:53
Message: <570fc8c9$1@news.povray.org>
On 4/14/2016 4:43 PM, Jaime Vives Piqueres wrote:
> . if your family photos are too well preserved, this is
> a good solution. ;)


I really think you need a frame around the images.
Is it a broken picture frame or a broken plate negative?

And what's with the fruit?
Brings, Meléndez and Velázquez to mind. ;-)

-- 

Regards
     Stephen


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From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 14 Apr 2016 14:52:12
Message: <570fe6dc$1@news.povray.org>
El 14/04/16 a las 18:43, Stephen escribió:
> I really think you need a frame around the images. Is it a broken
> picture frame or a broken plate negative?

   It's the back of an old photo, scanned and inverted, so that the
cracks act as if the picture was scratched and broken. I've a lot of old
photographs with interesting back sides... some as old as 80 years.

> And what's with the fruit? Brings, Meléndez and Velázquez to mind.
> ;-)

   Yes, Meléndez was really a fruiterer... :)

--
jaime


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From: Stephen
Subject: Re: Experimental tonemapping tests
Date: 14 Apr 2016 15:12:41
Message: <570feba9$1@news.povray.org>
On 4/14/2016 7:52 PM, Jaime Vives Piqueres wrote:
> El 14/04/16 a las 18:43, Stephen escribió:
>> I really think you need a frame around the images. Is it a broken
>> picture frame or a broken plate negative?
>
>    It's the back of an old photo, scanned and inverted, so that the
> cracks act as if the picture was scratched and broken. I've a lot of old
> photographs with interesting back sides... some as old as 80 years.
>

An interesting technique. It changes the mood quite a bit.


>> And what's with the fruit? Brings, Meléndez and Velázquez to mind.
>> ;-)
>
>    Yes, Meléndez was really a fruiterer... :)
>

Yes, but it is still, life. </g>


-- 

Regards
     Stephen


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From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 14 Apr 2016 17:07:33
Message: <57100695@news.povray.org>
El 14/04/16 a las 21:12, Stephen escribió:
> An interesting technique. It changes the mood quite a bit.

   Well, I forgot to say that apart from the "blending" of the old paper
image, I applied also some random changes to the color curves to
simulate the "vintage" coloring (I was too lazy to investigate proper
curves for the different "vintage" effects, so I resorted to our old
friend "rand"):

    // random vintage effect
    #declare r_v=seed(1709);
    #declare exp_r=rand(r_v)*2;
    #declare exp_g=rand(r_v)*2;
    #declare exp_b=rand(r_v)*2;
    #declare sat=1-.75+rand(r_v)*.25;
    #declare f_old_paper=
    function{
      pigment{
        image_map{
          jpeg "jvp_old_photo_back_1"
          interpolate 2
        }
        scale <1,-1,1>
        #if(image_height>image_width)
          rotate 90*z
        #end
      }
    }
    tonemapping{
      parameters{red,green,blue,gray,x,y}
      function(r,g,b,gr,x,y) 
{max(pow(r,exp_r),f_old_paper(x,y,0).red)*(1-sat)+gr*sat}
      function(r,g,b,gr,x,y) 
{max(pow(g,exp_g),f_old_paper(x,y,0).green)*(1-sat)+gr*sat}
      function(r,g,b,gr,x,y) 
{max(pow(b,exp_b),f_old_paper(x,y,0).blue)*(1-sat)+gr*sat}
    }

    Just change the random seed until you find a nice coloring...

--
jaime


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Attachments:
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Preview of image 'jvp_old_photo_back_1.jpg'
jvp_old_photo_back_1.jpg


 

From: Paolo Gibellini
Subject: Re: Experimental tonemapping tests
Date: 18 Apr 2016 04:46:33
Message: <57149ee9$1@news.povray.org>
Jaime Vives Piqueres wrote on 14/04/2016 17.43:
> You know you have been raytracing for too long... when your old renders
> are old and worn.
>
> Here I'm using screen.inc combined with the tonemapping feature to make
> "vintage" versions of my old renders. It works pretty well on
> photographs too... if your family photos are too well preserved, this is
> a good solution. ;)
>
> --
> jaime
>
>

Hey! Stop posting photos here!

:D

I like them a lot,
Paolo


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