[hugin-ptx] Re: Enfuse 4.1.1 CIECAM bug?

['dkloi' via hugin and other free panoramic software]

I found reference to the bug at
https://bugs.launchpad.net/enblend/+bug/752283
https://bugs.launchpad.net/enblend/+bug/1576862
https://discuss.pixls.us/t/enfuse-artifacts/4687 



On Wednesday, 2 August 2017 19:33:59 UTC+1, mh00h wrote:
>
> I have this exact same speckles problem in Arch Linux. It seems to be 
> worse as images scale up in size. And as you've pointed out, sections of 
> photo that are close to black exhibit the worst of it. It's possible these 
> speckles span into the lighter sections of a photo too but get masked?
> I've noticed that most panos I stitch have a flat appearance and am 
> curious if your OP discovery is finally the reason why. I had asked the 
> same question around on reddit 
> but
>  
> made little progress there.
>
> On Wednesday, August 2, 2017 at 11:14:12 AM UTC-7, dkloi wrote:
>>
>> Not sure whether this particular bug has been fixed, but I have had a 
>> problem with coloured speckled pixels in dark areas of the blended output 
>> (the speckled pixels weren't present in the remapped input images). An 
>> example is attached. This disappears when using the --no-ciecam option. 
>> This is with the enblend included in the 64bit Windows version of 2017.0.0.
>>
>> On Wednesday, 2 August 2017 18:50:34 UTC+1, mh00h wrote:
>>>
>>> Does this problem persist in enblend 4.2?
>>>
>>> On Tuesday, October 8, 2013 at 2:39:40 PM UTC-7, dex Otaku wrote:

 Further info in case it may be of use:

 I'm shooting raw with a Sony alpha 55 and a sigma 10-20mm @10mm for 
 panos.  

 The camera is set to use the AdobeRGB profile.  I usually use Lightroom 
 [4.x] to make 16-bit TIFFs of the images with some basic exposure 
 processing.  Sometimes I use RawTherapee instead [it has finer control 
 over 
 noise reduction].  My displays are profiled using Dispcalgui/Argyll CMS 
 [under Windows, yes].

 Previews using the 16bpc TIFFs display as expected, but no renders 
 expose correctly, regardless of image content.  

 Using enblend with --no-ciecam gives "expected" results.  Without it, 
 images are always as described by the OP.

 Using the sRGB profile instead of AdobeRGB from the camera makes no 
 difference.  Rendering my intermediates as sRGB [converting colour spaces 
 before Hugin] also makes no difference.

>>>

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[hugin-ptx] Re: Enfuse 4.1.1 CIECAM bug?

[mh00h]

I have this exact same speckles problem in Arch Linux. It seems to be worse 
as images scale up in size. And as you've pointed out, sections of photo 
that are close to black exhibit the worst of it. It's possible these 
speckles span into the lighter sections of a photo too but get masked?
I've noticed that most panos I stitch have a flat appearance and am curious 
if your OP discovery is finally the reason why. I had asked the same 
question around on reddit 
but
 
made little progress there.

On Wednesday, August 2, 2017 at 11:14:12 AM UTC-7, dkloi wrote:
>
> Not sure whether this particular bug has been fixed, but I have had a 
> problem with coloured speckled pixels in dark areas of the blended output 
> (the speckled pixels weren't present in the remapped input images). An 
> example is attached. This disappears when using the --no-ciecam option. 
> This is with the enblend included in the 64bit Windows version of 2017.0.0.
>
> On Wednesday, 2 August 2017 18:50:34 UTC+1, mh00h wrote:
>>
>> Does this problem persist in enblend 4.2?
>>
>> On Tuesday, October 8, 2013 at 2:39:40 PM UTC-7, dex Otaku wrote:
>>>
>>> Further info in case it may be of use:
>>>
>>> I'm shooting raw with a Sony alpha 55 and a sigma 10-20mm @10mm for 
>>> panos.  
>>>
>>> The camera is set to use the AdobeRGB profile.  I usually use Lightroom 
>>> [4.x] to make 16-bit TIFFs of the images with some basic exposure 
>>> processing.  Sometimes I use RawTherapee instead [it has finer control over 
>>> noise reduction].  My displays are profiled using Dispcalgui/Argyll CMS 
>>> [under Windows, yes].
>>>
>>> Previews using the 16bpc TIFFs display as expected, but no renders 
>>> expose correctly, regardless of image content.  
>>>
>>> Using enblend with --no-ciecam gives "expected" results.  Without it, 
>>> images are always as described by the OP.
>>>
>>> Using the sRGB profile instead of AdobeRGB from the camera makes no 
>>> difference.  Rendering my intermediates as sRGB [converting colour spaces 
>>> before Hugin] also makes no difference.
>>>
>>

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[hugin-ptx] Re: Enfuse 4.1.1 CIECAM bug?

[mh00h]

Does this problem persist in enblend 4.2?

On Tuesday, October 8, 2013 at 2:39:40 PM UTC-7, dex Otaku wrote:
>
> Further info in case it may be of use:
>
> I'm shooting raw with a Sony alpha 55 and a sigma 10-20mm @10mm for panos. 
>  
>
> The camera is set to use the AdobeRGB profile.  I usually use Lightroom 
> [4.x] to make 16-bit TIFFs of the images with some basic exposure 
> processing.  Sometimes I use RawTherapee instead [it has finer control over 
> noise reduction].  My displays are profiled using Dispcalgui/Argyll CMS 
> [under Windows, yes].
>
> Previews using the 16bpc TIFFs display as expected, but no renders expose 
> correctly, regardless of image content.  
>
> Using enblend with --no-ciecam gives "expected" results.  Without it, 
> images are always as described by the OP.
>
> Using the sRGB profile instead of AdobeRGB from the camera makes no 
> difference.  Rendering my intermediates as sRGB [converting colour spaces 
> before Hugin] also makes no difference.
>

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http://wiki.panotools.org/Hugin_FAQ
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[hugin-ptx] Re: Enfuse 4.1.1 CIECAM bug?

[dex Otaku]

On Monday, 7 October 2013 06:07:39 UTC-5, dkloi wrote:

 I've been trying to track down a problem with enblended images suffering a 
 lack of contrast with respect to the remapped images. It seems that I am 
 not the only one experiencing this problem and it is due to the CIECAM 
 blending default option for input images with colour profiles. 

 I'm pretty sure this issue started for me with 2013RC1 [on Windows].  I 
have downloaded RC2 but not processed anything yet.  

I've just gotten used to not being able to render anything successfully 
without using the --no-ciecam option.

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[hugin-ptx] Re: Enfuse 4.1.1 CIECAM bug?

[dex Otaku]

Further info in case it may be of use:

I'm shooting raw with a Sony alpha 55 and a sigma 10-20mm @10mm for panos.  

The camera is set to use the AdobeRGB profile.  I usually use Lightroom 
[4.x] to make 16-bit TIFFs of the images with some basic exposure 
processing.  Sometimes I use RawTherapee instead [it has finer control over 
noise reduction].  My displays are profiled using Dispcalgui/Argyll CMS 
[under Windows, yes].

Previews using the 16bpc TIFFs display as expected, but no renders expose 
correctly, regardless of image content.  

Using enblend with --no-ciecam gives expected results.  Without it, 
images are always as described by the OP.

Using the sRGB profile instead of AdobeRGB from the camera makes no 
difference.  Rendering my intermediates as sRGB [converting colour spaces 
before Hugin] also makes no difference.

-- 
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
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