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Am 28.02.2016 um 12:24 schrieb William F Pokorny:
> I am seeing some shift in optics.pov result 3.7.0 stable to POV-Ray
> 3.7.1-alpha.8499454. I like the new, less intense, result over the old,
> but is this 3.7.0 to 3.7.1 change expected ?
>
> Bill P.
You're right 8)
Just did a 1200x900 render using the versions mentioned above...
Haven't noticed the "new look" while toying hunting for the error.
Expected change... Interesting Question :)
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Am 28.02.2016 um 13:40 schrieb ThH:
> Expected change... Interesting Question :)
abyss.pov 3.7.0 vs 3.7.1... Same result: 2 "different" Images.
Expected change ?
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Am 28.02.2016 um 12:24 schrieb William F Pokorny:
> On 02/28/2016 05:04 AM, clipka wrote:
>>
>> You might want to test the newest version though :D
>>
>
> Cool! You got the bug - thanks.
>
> I am seeing some shift in optics.pov result 3.7.0 stable to POV-Ray
> 3.7.1-alpha.8499454. I like the new, less intense, result over the old,
> but is this 3.7.0 to 3.7.1 change expected ?
There are various factors that could contribute.
For one thing, the old encoding/decoding scheme for the photon colour
data was flawed, leading to a systematic error in the photon brightness,
which has been fixed in 3.7.1. However, that doesn't seem to fit the
bill, as this error should have manifested as a slight bias towards
black, so that in 3.7.1 we should see an _increase_ rather than a
decrease in brightness.
Another thing is that the error in the photons code I've just fixed has
been around for quite a while, and _did_ already exist in 3.7.0; it just
didn't surface until the change in the encoding/decoding scheme
translated it into artifacts Unix systems. It _may_ be that the old
encoding/decoding scheme did already translate the error into artifacts,
and that they just were a lot less bright.
My current favourite theory, however, is that the change in brightness
is related to a change in the media computation. There, too, a
long-standing flaw led to another systematic error, which has also been
fixed in 3.7.1.
Note that this can explain the differences in abyss.pov, too.
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Am 28.02.2016 um 15:29 schrieb clipka:
> My current favourite theory, however, is that the change in brightness
> is related to a change in the media computation. There, too, a
> long-standing flaw led to another systematic error, which has also been
> fixed in 3.7.1.
Currently trying some more scenes.
I had the impression the effect might be linked to media.
> Note that this can explain the differences in abyss.pov, too.
I see.
Slightly off-topic...
Does anyone know of a software (Linux) to compare 2 images?
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ThH <no.spam@address> wrote:
> Slightly off-topic...
>
> Does anyone know of a software (Linux) to compare 2 images?
OpenCV library
Paint.NET
Photoshop
ImageMagick
convert img1 img2 -fx "(((255*u)&(255*(1-v)))|((255*(1-u))&(255*v)))/255"
img_out
Hope that gets you some sort of useful start...
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Am 28.02.2016 um 15:53 schrieb Bald Eagle:
>> Does anyone know of a software (Linux) to compare 2 images?
>
> OpenCV library
> Paint.NET
> Photoshop
> ImageMagick
> convert img1 img2 -fx "(((255*u)&(255*(1-v)))|((255*(1-u))&(255*v)))/255"
> img_out
>
>
> Hope that gets you some sort of useful start...
I'm sure it will. Thank you Bald Eagle :)
Will try convert in a few minutes ;)
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Am 28.02.2016 um 15:43 schrieb ThH:
> Does anyone know of a software (Linux) to compare 2 images?
If you are willing to invest a few bucks, I can highly recommend Scooter
Software's BeyondCompare 4.
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Am 28.02.2016 um 16:09 schrieb clipka:
> If you are willing to invest a few bucks, I can highly recommend Scooter
> Software's BeyondCompare 4.
Thank you clipka.
Think ixquick will find it for me ;)
"few bucks"... Depends on how much is few. Will find out :)
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Am 28.02.2016 um 16:09 schrieb ThH:
> Will try convert in a few minutes ;)
convert is the way for me. Thanks you for the example above Bald Eagle :))
Free and for the terminal ;)
As said before: Always learning something new :)
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Am 28.02.2016 um 16:21 schrieb ThH:
> Think ixquick will find it for me ;)
>
> "few bucks"... Depends on how much is few. Will find out :)
Ok. This is the _big_ solution ;)
Will be remember it, if I need a _big_ solution.
Thanks again clipka :)
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