racenviper
Posts: 60
Location: Swartz Creek Michigan, United States
Registered: 27 Mar 2007
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The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 13:03 GMT
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This was completed with the help of enfuse. I had taken 3 exposures for each position -2, 0, +2. I used enfuse to combine these images. Then PTGui to stitch the images.
Problems: vertical line, Nadir, purple fringing.
I have not done a post processing to this image, such as sharping.
Feedback please
www.panoguide.com/gallery/617/
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Smooth
Posts: 1468
Location: Australia
Registered: 21 Jul 2004
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 13:47 GMT
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Looks to be a nice place and great spot to shoot a panorama. But the HDR to me ruins this scene as it typically does most times in my eyes. For HDR to be correct you shouldn't be able to tell it been done at all and this panorama has obvious signs. The scene becomes flat and lacks depth. Natural shadows get over brightened and colours get a fake look about them (the latter, more so when viewed flat admittedly).
I would like to see this same panorama without the HDR as it has the potential to be a very nice spherical pano.
Others I'm sure will share their opinions.
Regards, Smooth 
www.smooth360.com
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Matt Rogers
[360 Precision]
Posts: 213
Location: Oxford UK, United Kingdom
Registered: 16 Jun 2005
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 14:59 GMT
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I agree with Smooth on this and I don't see why this scene would need 3 exposures. But lets get one thing clear, Enfuse does not create HDR images. It blends exposures to increase the dynamic range of the scene. At no point in the process is an HDR file ever create. It's just like people calling tone-mapped images HDR when they're not. HDR images have a specific file format and a much larger contrast ratio hence the need to tone-map the output to either 8 or 16 bit formats.
It would be good if the authority figures on Panoguide could use the correct terminology when posting and answering questions. But I think it's a losing battle, as every forum I visit has people posting tone-mapped images as examples of HDR photography 
Matt
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John Houghton
Posts: 2308
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 18:00 GMT
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I also agree that the pano is lacking in contrast - not uncommon when a high dynamic range subject has been shoehorned into a low dynamic range image format (by whatever means), but that can probably be easily tweaked. Whether the colours would then be reasonably faithful to the original scene, I've no means of knowing.
As to the "problems" listed, it's not clear whether you were merely saying you were already aware of them or whether you wanted help with them. Just in case: the vertical line is due to resizing a layered image in Photoshop - even when there's only one layer. You must flatten the image first.
John
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racenviper
Posts: 60
Location: Swartz Creek Michigan, United States
Registered: 27 Mar 2007
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 18:21 GMT
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The image from PTGui does not have layers, so I don't know why I'm getting the line.
Yes I agree on the contrast issue. I have not done and post processing yet.
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Hans Nyberg
Posts: 856
Location: Denmark
Registered: 28 Aug 2005
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 18:27 GMT
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It has layers but you only have one.
You have to flatten that layer.
Hans
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John Houghton
Posts: 2308
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 18:34 GMT
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racenviper said: The image from PTGui does not have layers,
True if you output a jpeg file, but if you output a tif file, the image is a layered file with one layer. You can demonstrate this by applying the eraser tool. If it reveals the chequerboard pattern underneath, it is layered. After flattening the file into a background layer, the eraser tool will erase to the current background colour.
John
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racenviper
Posts: 60
Location: Swartz Creek Michigan, United States
Registered: 27 Mar 2007
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 19:31 GMT
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It was a PTGui output to Photoshop PSD file. So I'll try that tonight. Thanks Hans
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Krzysztof
Posts: 28
Location: Poland
Registered: 15 Jul 2005
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 23:09 GMT
updated: 31 Jan 2008 at 23:11 GMT
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Hans Nyberg said: You have to flatten that layer.
Can I just delete that layer if I use tif?
--
Regards,
Krzysztof
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racenviper
Posts: 60
Location: Swartz Creek Michigan, United States
Registered: 27 Mar 2007
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 31 Jan 2008 at 23:12 GMT
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No, it needs to be flatten and that is what I forgot to do.
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ebig
Posts: 155
Location: Haiku, Maui, Hawaii, United States
Registered: 21 May 2007
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 3 Feb 2008 at 2:57 GMT
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Nice view...I am curious about the CA in the trees just above the boulder - whether that could be removed in RAW conversion or is being accentuated in the HDR.
Regards
Ed
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racenviper
Posts: 60
Location: Swartz Creek Michigan, United States
Registered: 27 Mar 2007
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Re: The Narrows, Zion National Park UT, enfuse used.
Posted: 3 Feb 2008 at 3:11 GMT
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Not CA, Purple fringing. I removed CA with ACR.
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