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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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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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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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