Zero Overlap creates dark contrast edges on homogeneous background
56 views
Skip to first unread message
Sven Flock
Mar 14, 2021, 6:04:19 AM3/14/21
to PTGui Support
Hi all,
I was very pleased to read about the new features of PTGui 12 Pro and I bought a license upgrade yesterday. Of course, I had to try out the new features, i.e. working with zero overlay and HDR post processing before blending. Both features come very handy if the exposure changes during shoot as I have understood correctly. So, I did and indoor panorama. The weather was cloudy with a bit of sun rays coming trough. During the shooting the lightning changed a bit. So here are results:
Editor view with no blending to see the edges and exposure differences:
Editor view with zero overlap enabled
No bending rendered:
Zero overlap rendered:
The zero overlay algorithm seems to create dark spots on the edges if we deal with homogenous areas with high exposure differences. This behaviour, though, is not constant on the whole picture. I will show you that with an other example. But before, I get dark contrast edges on the window even the whole window is taken from the same source images (see editor view above):
I have no idea if that is related to the zero overlay situation as the sources don't show that dark halo. around the window.
Ok, so here is the second example where everything seems to work perfectly:
Editor view with no blending to the exposure differences:
Editor view zero overlay:
Rendered view zero overlay:
This is perfect result. There are no dark constrast edges.
I have played around with the precision slider, tried to HDR before blending and the other way arround with no difference at all.
Is there a way to get rid of the dark spots?
Sven Flock
Mar 14, 2021, 7:33:52 AM3/14/21
to PTGui Support
Hi again,
I did a reshoot of the scenary with a very constant outdoor lighning. The result is now much better, but still the contrast edges remain. This time, it gets brighter:
Editor view to see the edges:
Rendered view (brighter spots):
I wanted to know if projected correctly the errors get less disturbing (litte bit better):
Disabling "find optimum seams" and going over to multiband the result is perfect:
So: in summary: is using the features "find optimimum seams" and "zero overlap" only usable in non-homogenous panoramas and not good for real estate indoor photography?
Thanks!
PTGui Support
Mar 14, 2021, 7:34:34 AM3/14/21
to pt...@googlegroups.com
Hi Sven,
It looks like you are trying to blend the bracketed images as if they
were regular (non HDR) images. The exposure differences are huge, you
shouldn't expect the blender to fix this completely.
Could you try Images -> Link HDR bracketed exposures?
If PTGui doesn't recognize your brackets, please see 7.3:
https://www.ptgui.com/support.html#7_3
If that doesn't help, please make your project file and source images
available so I can see what's going on exactly.
Kind regards,
Joost Nieuwenhuijse
www.ptgui.com
On 14/03/2021 11:04, Sven Flock wrote:
> Hi all,
>
> I was very pleased to read about the new features of PTGui 12 Pro and I
> bought a license upgrade yesterday. Of course, I had to try out the new
> features, i.e. working with zero overlay and HDR post processing before
> blending. Both features come very handy if the exposure changes during
> shoot as I have understood correctly. So, I did and indoor panorama. The
> weather was cloudy with a bit of sun rays coming trough. During the
> shooting the lightning changed a bit. So here are results:
>
> Editor view with no blending to see the edges and exposure differences:
>
>
> No bending rendered:
>
> Scenario1RenderedDontBlend.jpg
>
> Zero overlap rendered:
> You received this message because you are subscribed to the Google
> Groups "PTGui Support" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to ptgui+un...@googlegroups.com
> <mailto:ptgui+un...@googlegroups.com>.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/ptgui/270d6d1d-3557-43a9-a065-20676de45961n%40googlegroups.com
> <https://groups.google.com/d/msgid/ptgui/270d6d1d-3557-43a9-a065-20676de45961n%40googlegroups.com?utm_medium=email&utm_source=footer>.
It looks like you are trying to blend the bracketed images as if they
were regular (non HDR) images. The exposure differences are huge, you
shouldn't expect the blender to fix this completely.
Could you try Images -> Link HDR bracketed exposures?
If PTGui doesn't recognize your brackets, please see 7.3:
https://www.ptgui.com/support.html#7_3
If that doesn't help, please make your project file and source images
available so I can see what's going on exactly.
Kind regards,
Joost Nieuwenhuijse
www.ptgui.com
On 14/03/2021 11:04, Sven Flock wrote:
> Hi all,
>
> I was very pleased to read about the new features of PTGui 12 Pro and I
> bought a license upgrade yesterday. Of course, I had to try out the new
> features, i.e. working with zero overlay and HDR post processing before
> blending. Both features come very handy if the exposure changes during
> shoot as I have understood correctly. So, I did and indoor panorama. The
> weather was cloudy with a bit of sun rays coming trough. During the
> shooting the lightning changed a bit. So here are results:
>
> Editor view with no blending to see the edges and exposure differences:
>
> Scenario1EditorDontBlend.jpg
>
> Editor view with zero overlap enabled
>
> Scenario1EditorZeroOverlap.jpg
>
> Editor view with zero overlap enabled
>
>
> No bending rendered:
>
> Scenario1RenderedDontBlend.jpg
>
> Zero overlap rendered:
>
> Scenario1RenderedZeroOverlap.jpg
>
> The zero overlay algorithm seems to create dark spots on the edges if we
> deal with homogenous areas with high exposure differences. This
> behaviour, though, is not constant on the whole picture. I will show you
> that with an other example. But before, I get dark contrast edges on the
> window even the whole window is taken from the same source images (see
> editor view above):
>
> Scenario1RenderedZeroOverlap.jpg
>
> The zero overlay algorithm seems to create dark spots on the edges if we
> deal with homogenous areas with high exposure differences. This
> behaviour, though, is not constant on the whole picture. I will show you
> that with an other example. But before, I get dark contrast edges on the
> window even the whole window is taken from the same source images (see
> editor view above):
>
> SourcesWindow.jpg
>
> I have no idea if that is related to the zero overlay situation as the
> sources don't show that dark halo. around the window.
>
> Ok, so here is the second example where everything seems to work perfectly:
>
> Editor view with no blending to the exposure differences:
>
>
> I have no idea if that is related to the zero overlay situation as the
> sources don't show that dark halo. around the window.
>
> Ok, so here is the second example where everything seems to work perfectly:
>
> Editor view with no blending to the exposure differences:
>
> Scenario2EditorDontBlend.jpg
>
> Editor view zero overlay:
>
>
> Editor view zero overlay:
>
> Scenario2EditorZeroOverlap.jpg
>
> Rendered view zero overlay:
>
>
> Rendered view zero overlay:
>
> Scenario2RenderedZeroOverlap.jpg
>
> This is perfect result. There are no dark constrast edges.
>
> I have played around with the precision slider, tried to HDR before
> blending and the other way arround with no difference at all.
>
> Is there a way to get rid of the dark spots?
>
> --
>
> This is perfect result. There are no dark constrast edges.
>
> I have played around with the precision slider, tried to HDR before
> blending and the other way arround with no difference at all.
>
> Is there a way to get rid of the dark spots?
>
> You received this message because you are subscribed to the Google
> Groups "PTGui Support" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to ptgui+un...@googlegroups.com
> <mailto:ptgui+un...@googlegroups.com>.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/ptgui/270d6d1d-3557-43a9-a065-20676de45961n%40googlegroups.com
> <https://groups.google.com/d/msgid/ptgui/270d6d1d-3557-43a9-a065-20676de45961n%40googlegroups.com?utm_medium=email&utm_source=footer>.
PTGui Support
Mar 14, 2021, 7:36:32 AM3/14/21
to pt...@googlegroups.com
Hi Sven,
The unblended panorama still looks awful, this will never work.
You should have a more or less even exposure in the unblended panorama.
Then blender will then fix the remaining differences.
>
> *So: in summary: is using the features "find optimimum seams" and "zero
> <https://groups.google.com/d/msgid/ptgui/db1fb1b6-53ea-4d35-9b8f-8f4bdb5c71bbn%40googlegroups.com?utm_medium=email&utm_source=footer>.
The unblended panorama still looks awful, this will never work.
You should have a more or less even exposure in the unblended panorama.
Then blender will then fix the remaining differences.
On 14/03/2021 12:33, Sven Flock wrote:
> Hi again,
>
> I did a reshoot of the scenary with a very constant outdoor lighning.
> The result is now much better, but still the contrast edges remain. This
> time, it gets brighter:
>
> Editor view to see the edges:
> Hi again,
>
> I did a reshoot of the scenary with a very constant outdoor lighning.
> The result is now much better, but still the contrast edges remain. This
> time, it gets brighter:
>
> Editor view to see the edges:
> Editor.jpg
>
> Rendered view (brighter spots):
>
>
> Rendered view (brighter spots):
>
> Rendered.jpg
>
> I wanted to know if projected correctly the errors get less disturbing
> (litte bit better):
>
>
> I wanted to know if projected correctly the errors get less disturbing
> (litte bit better):
>
> Projected.jpg
>
> Disabling "find optimum seams" and going over to multiband the result is
> perfect:
>
> no_seams_multiband.jpg
>
> Disabling "find optimum seams" and going over to multiband the result is
> perfect:
>
>
> *So: in summary: is using the features "find optimimum seams" and "zero
> overlap" only usable in non-homogenous panoramas and not good for real
> estate indoor photography?*
>
> Thanks!
>
> Sven Flock schrieb am Sonntag, 14. März 2021 um 11:04:19 UTC+1:
>
> Hi all,
>
> I was very pleased to read about the new features of PTGui 12 Pro
> and I bought a license upgrade yesterday. Of course, I had to try
> out the new features, i.e. working with zero overlay and HDR post
> processing before blending. Both features come very handy if the
> exposure changes during shoot as I have understood correctly. So, I
> did and indoor panorama. The weather was cloudy with a bit of sun
> rays coming trough. During the shooting the lightning changed a bit.
> So here are results:
>
> Editor view with no blending to see the edges and exposure differences:
>
> Thanks!
>
> Sven Flock schrieb am Sonntag, 14. März 2021 um 11:04:19 UTC+1:
>
> Hi all,
>
> I was very pleased to read about the new features of PTGui 12 Pro
> and I bought a license upgrade yesterday. Of course, I had to try
> out the new features, i.e. working with zero overlay and HDR post
> processing before blending. Both features come very handy if the
> exposure changes during shoot as I have understood correctly. So, I
> did and indoor panorama. The weather was cloudy with a bit of sun
> rays coming trough. During the shooting the lightning changed a bit.
> So here are results:
>
> Editor view with no blending to see the edges and exposure differences:
>
> Scenario1EditorDontBlend.jpg
>
> Editor view with zero overlap enabled
>
>
> Editor view with zero overlap enabled
>
> Scenario1EditorZeroOverlap.jpg
>
> No bending rendered:
>
> Scenario1RenderedDontBlend.jpg
>
> Zero overlap rendered:
>
>
> No bending rendered:
>
> Scenario1RenderedDontBlend.jpg
>
> Zero overlap rendered:
>
> Scenario1RenderedZeroOverlap.jpg
>
> The zero overlay algorithm seems to create dark spots on the edges
> if we deal with homogenous areas with high exposure differences.
> This behaviour, though, is not constant on the whole picture. I will
> show you that with an other example. But before, I get dark contrast
> edges on the window even the whole window is taken from the same
> source images (see editor view above):
>
>
> The zero overlay algorithm seems to create dark spots on the edges
> if we deal with homogenous areas with high exposure differences.
> This behaviour, though, is not constant on the whole picture. I will
> show you that with an other example. But before, I get dark contrast
> edges on the window even the whole window is taken from the same
> source images (see editor view above):
>
> SourcesWindow.jpg
>
> I have no idea if that is related to the zero overlay situation as
> the sources don't show that dark halo. around the window.
>
> Ok, so here is the second example where everything seems to work
> perfectly:
>
> Editor view with no blending to the exposure differences:
>
>
> I have no idea if that is related to the zero overlay situation as
> the sources don't show that dark halo. around the window.
>
> Ok, so here is the second example where everything seems to work
> perfectly:
>
> Editor view with no blending to the exposure differences:
>
> Scenario2EditorDontBlend.jpg
>
> Editor view zero overlay:
>
>
> Editor view zero overlay:
>
> Scenario2EditorZeroOverlap.jpg
>
> Rendered view zero overlay:
>
>
> Rendered view zero overlay:
>
> Scenario2RenderedZeroOverlap.jpg
>
> This is perfect result. There are no dark constrast edges.
>
> I have played around with the precision slider, tried to HDR before
> blending and the other way arround with no difference at all.
>
> Is there a way to get rid of the dark spots?
>
>
> This is perfect result. There are no dark constrast edges.
>
> I have played around with the precision slider, tried to HDR before
> blending and the other way arround with no difference at all.
>
> Is there a way to get rid of the dark spots?
>
> --
> You received this message because you are subscribed to the Google
> Groups "PTGui Support" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to ptgui+un...@googlegroups.com
> <mailto:ptgui+un...@googlegroups.com>.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/ptgui/db1fb1b6-53ea-4d35-9b8f-8f4bdb5c71bbn%40googlegroups.com
> You received this message because you are subscribed to the Google
> Groups "PTGui Support" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to ptgui+un...@googlegroups.com
> <mailto:ptgui+un...@googlegroups.com>.
> To view this discussion on the web visit
> <https://groups.google.com/d/msgid/ptgui/db1fb1b6-53ea-4d35-9b8f-8f4bdb5c71bbn%40googlegroups.com?utm_medium=email&utm_source=footer>.
Sven Flock
Mar 14, 2021, 9:12:51 AM3/14/21
to PTGui Support
Hi Joost,
thanks for your quick reply.
I have checked my settings: images are linked as shot on a tripod (which I did). Is that what you meant?
Is there a way to send you a link to my cloud drive in private? I don't want to share high resolution tiffs in public.
I got better results with 1/64 resolution, though. Of course, I can remove the spots in Photoshop, I was just curious if it can be more optimized in PTGui in the first place. It does an fantastic job to get it to the current outcome. in PTGui 11 this panorama would have been lost, PTGui 12 saves it :-).
Do you have an explanation why I still got the edge problems with my second try with a much better exposure distribution?
Andik2000
Mar 14, 2021, 12:21:20 PM3/14/21
to PTGui Support
Hi Sven,
unfortunately i also get those awful dark halos around windows and lighted areas, when using HDR in PTgui. Maybe i haven't found the right adjustments, but when i put my three bracketed images in Lightroom together, i get a much more better looking result.
Then i do my exposure settings and export as 16 bit TIF and start the work in PTGui.
Best regards,
Andi
Sven Flock
Mar 14, 2021, 12:57:47 PM3/14/21
to PTGui Support
Hi Andi,
I think that I just found a way to get rid of the dark halos around the window. I use exposure fusion. By increasing the parameter "sigma" to 0.4 to 0.5 I get good results:
Give it a try.
Bye,
Sven
Andik2000
Mar 14, 2021, 1:01:44 PM3/14/21
to PTGui Support
Wow, great to see.
I definitive will try!
Thanks,
Andi
PTGui Support
Mar 14, 2021, 1:37:08 PM3/14/21
to pt...@googlegroups.com
Hi Sven,
I would need to see what you are doing, I can't explain those exposure
differences in your unblended panorama.
Can you share the source images and your PTGui project file with support
at ptgui.com?
> <https://groups.google.com/d/msgid/ptgui/db1fb1b6-53ea-4d35-9b8f-8f4bdb5c71bbn%40googlegroups.com?utm_medium=email&utm_source=footer
> <https://groups.google.com/d/msgid/ptgui/db1fb1b6-53ea-4d35-9b8f-8f4bdb5c71bbn%40googlegroups.com?utm_medium=email&utm_source=footer>>.
> <https://groups.google.com/d/msgid/ptgui/4a7236f6-c7e1-47f4-b624-387cb3188b68n%40googlegroups.com?utm_medium=email&utm_source=footer>.
I would need to see what you are doing, I can't explain those exposure
differences in your unblended panorama.
Can you share the source images and your PTGui project file with support
at ptgui.com?
On 14/03/2021 14:12, Sven Flock wrote:
> Hi Joost,
>
> thanks for your quick reply.
>
> I have checked my settings: images are linked as shot on a tripod (which
> I did). Is that what you meant?
>
> Is there a way to send you a link to my cloud drive in private? I don't
> want to share high resolution tiffs in public.
>
> I got better results with 1/64 resolution, though. Of course, I can
> remove the spots in Photoshop, I was just curious if it can be more
> optimized in PTGui in the first place. It does an fantastic job to get
> it to the current outcome. in PTGui 11 this panorama would have been
> lost, PTGui 12 saves it :-).
>
> Do you have an explanation why I still got the edge problems with my
> second try with a much better exposure distribution?
>
> PTGui Support schrieb am Sonntag, 14. März 2021 um 12:36:32 UTC+1:
>
> Hi Sven,
>
> The unblended panorama still looks awful, this will never work.
>
> You should have a more or less even exposure in the unblended panorama.
> Then blender will then fix the remaining differences.
>
> Kind regards,
>
> Joost Nieuwenhuijse
> www.ptgui.com <http://www.ptgui.com>
> Hi Joost,
>
> thanks for your quick reply.
>
> I have checked my settings: images are linked as shot on a tripod (which
> I did). Is that what you meant?
>
> Is there a way to send you a link to my cloud drive in private? I don't
> want to share high resolution tiffs in public.
>
> I got better results with 1/64 resolution, though. Of course, I can
> remove the spots in Photoshop, I was just curious if it can be more
> optimized in PTGui in the first place. It does an fantastic job to get
> it to the current outcome. in PTGui 11 this panorama would have been
> lost, PTGui 12 saves it :-).
>
> Do you have an explanation why I still got the edge problems with my
> second try with a much better exposure distribution?
>
> PTGui Support schrieb am Sonntag, 14. März 2021 um 12:36:32 UTC+1:
>
> Hi Sven,
>
> The unblended panorama still looks awful, this will never work.
>
> You should have a more or less even exposure in the unblended panorama.
> Then blender will then fix the remaining differences.
>
> Kind regards,
>
> Joost Nieuwenhuijse
> <https://groups.google.com/d/msgid/ptgui/db1fb1b6-53ea-4d35-9b8f-8f4bdb5c71bbn%40googlegroups.com?utm_medium=email&utm_source=footer>>.
>
>
> --
> You received this message because you are subscribed to the Google
> Groups "PTGui Support" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to ptgui+un...@googlegroups.com
> <mailto:ptgui+un...@googlegroups.com>.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/ptgui/4a7236f6-c7e1-47f4-b624-387cb3188b68n%40googlegroups.com
>
> --
> You received this message because you are subscribed to the Google
> Groups "PTGui Support" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to ptgui+un...@googlegroups.com
> <mailto:ptgui+un...@googlegroups.com>.
> To view this discussion on the web visit
> <https://groups.google.com/d/msgid/ptgui/4a7236f6-c7e1-47f4-b624-387cb3188b68n%40googlegroups.com?utm_medium=email&utm_source=footer>.
Reply all
Reply to author
Forward
0 new messages