POV-Ray : Newsgroups : povray.binaries.images : A tilt shift image processing effect. Server Time
28 Mar 2024 16:08:40 EDT (-0400)
  A tilt shift image processing effect. (Message 1 to 4 of 4)  
From: William F Pokorny
Subject: A tilt shift image processing effect.
Date: 19 Sep 2016 12:35:27
Message: <57e013cf$1@news.povray.org>
Uses new potential pattern and the not yet merged density{image_map{}} 
feature of pull request #82.

Bill P.


Post a reply to this message


Attachments:
Download 'tiltshifteffect.jpg' (188 KB) Download 'tiltshifteffect.pov.txt' (2 KB)

Preview of image 'tiltshifteffect.jpg'
tiltshifteffect.jpg

From: Doctor John
Subject: Re: A tilt shift image processing effect.
Date: 19 Sep 2016 14:47:41
Message: <57e032cd$1@news.povray.org>
On 19/09/16 17:35, William F Pokorny wrote:
> Uses new potential pattern and the not yet merged density{image_map{}}
> feature of pull request #82.
> 
> Bill P.
> 
Interesting, Bill. This looks suspiciously like what I was trying (and
failing) to do with my FieldCam macro. I had guessed that playing with
PoV source was necessary but didn't trust my coding abilities.
Well done

John
-- 
It's not about bravery.
It's about doing what I need to do to win


Post a reply to this message

From: William F Pokorny
Subject: Re: A tilt shift image processing effect.
Date: 20 Sep 2016 09:57:37
Message: <57e14051$1@news.povray.org>
On 09/19/2016 02:47 PM, Doctor John wrote:
> On 19/09/16 17:35, William F Pokorny wrote:
>> Uses new potential pattern and the not yet merged density{image_map{}}
>> feature of pull request #82.
>>
>> Bill P.
>>
> Interesting, Bill. This looks suspiciously like what I was trying (and
> failing) to do with my FieldCam macro. I had guessed that playing with
> PoV source was necessary but didn't trust my coding abilities.
> Well done
>
> John
>
Thanks John. If I somewhat remember, you were trying to implement a new 
camera type in SDL which is considerably harder.

What is done here is neat, but it's a post processing trick based upon 
using an input image as 3D media.

I was originally thinking of this image->density{}->media{} path in 
POV-Ray as a better color alternative to the many-images to three color 
df3 technique Stephen and Thomas are implementing for their Dragon Lady 
work. It is a variation of a technique that's long been used for clouds.

Thomas on seeing an earlier image->media proposal over in 
unofficial.patches made the comment, "That would be interesting and 
useful indeed" which got me thinking about more than a replacement for 
the image to df3 media method.

What might we be able to do, if we think about accomplishing image 
effects & processing by function/pattern control of image based 3D 
media(s) in addition to the usual techniques with layers and direct 2D 
data manipulations?

Attached is a camera in-motion blurring effect that just happens when 
using a small angle (3 deg) perspective camera and the image as 3D 
media.

Bill P.


Post a reply to this message


Attachments:
Download 'flyatcentermotionblur.jpg' (137 KB)

Preview of image 'flyatcentermotionblur.jpg'
flyatcentermotionblur.jpg


 

From: Thomas de Groot
Subject: Re: A tilt shift image processing effect.
Date: 21 Sep 2016 03:07:24
Message: <57e231ac@news.povray.org>
On 19-9-2016 20:47, Doctor John wrote:
> On 19/09/16 17:35, William F Pokorny wrote:
>> Uses new potential pattern and the not yet merged density{image_map{}}
>> feature of pull request #82.
>>
>> Bill P.
>>
> Interesting, Bill. This looks suspiciously like what I was trying (and
> failing) to do with my FieldCam macro. I had guessed that playing with
> PoV source was necessary but didn't trust my coding abilities.
> Well done
>

This looks different. The FieldCam macro does an excellent job for 
'falling buildings' and I use it consequently as such; I am not sure 
about what really happens here.

-- 
Thomas


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.