panorama software,virtual tour software
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Joined: 2002-10-29
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2002-10-29
#1

Seamless Panorama ??

Hi Members,
I 磛e got still a problem by creating seamless panos by using Panoweaver 2.2 and two fisheye pictures taken with a nikon coolpix 5000.

I croped the pictures like discribed in the forum before - but nothing satisfying happens.

Can anybody help me... or give me a hint

Thanks


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Joined: 2002-08-09
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2002-10-29
#2

Hi Kaani,

What I have found, through experience with nearly every stitcher, is that aiming for perfection can only go so far. No matter how perfectly you level, rotate, light, and stitch your panos, seamless/flawless panos are far in the minority of cases. Don't get me wrong, careful attention to detail will save you many headaches at the computer. However, to my experience, well-developed photo editing skills will allow you to attain you goals for quality and speed much more reliably.

Cropping your circles of extreme (blurry) distortion and light fall-off from the edges will help with a large portion of editing work attributed to seams. As will knowing your camera well enough to evaluate possible hemispherical matching errors while in the field. I believe that the largest time saver comes from knowing what can be remedied in a photo editing program and how long it will take. A fine line can be developed between knowing when to tinker a little longer with the stitch and knowing when to save the photo and work it out in an editor.

A link to an example of the results that are bothering you would do much to help me and others try to evaluate a solution.

Best regards,

Hans


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Joined: 2002-06-12
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2002-10-30
#3

I agree.  Quality [or lack of it] sometimes is highly subjective.

Kaani, do you have an website address where we can view the offending panorama??

Dave


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2002-10-30
#4

I understand what you mean, but there is something what I do not really understand in the handling of panoweaver. That is the field "Fisheye parameter". I don not really understand the systematic of this adjustment tool. For Example: http://www.savul.de you can see a pano wich was made by myself with a nikon coolpix 5000, fisheye adaptor, tilt leveler, the Kaidan Panohead and Panoweaver 2.2d.  What really irritates me in that picture is that dark stripe on the top. Is there a general way to eliminate this problem.

In this example it might be easy to make a correction in a photo editing programm, but there are photos with much more details in that area where this dark stripe appears. So I would be pleased for every hint I can get... (may I change to Version 2.4 or other solutions...)

 


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2002-10-30
#5

Ahhhh....I see better what you are talking about now. You're not alone. This is a common problem. Here is my method:

Whenever you can get away with it, do not use the "seam correcting" feature. This will give you a much more concise line which will be easier to "clone stamp" or "healing brush" in an app. like Photoshop (I don't know any other editing apps.).

The other option, that I seldom employ, is to use something like levels, curves, or brightness and a radial mask to reduce the light fall-off around the perimeter of the image circle.

I commonly deal with panos just like your example. My preference for fixing is to use the first method that I described. Even doing 3 pano stitches with Photovista or PTGui, I get the same sort of issues around the "poles" so, this is not limited to 2-hemisphere stitches.

You've already aknowledged your understanding of cropping the perimeter for better results. This is what the "Fisheye Parameter" adjustment is for in Panoweaver. Without cropping the perimeter, you can make some adjustments with this tool however (don't quote me on this one), it seems to be adjustable relative to incremental (not continual) differences in lighting. This seems to be why adjustments don't seem to make much sense when using this tool. What I mean is that the containing circle "jumps" rather than smoothly expanding and contracting.

When a photo has been cropped first using an image editor, try using the "Fisheye Paramter" then. You'll get no results from 0-100 because the image circle is too well defined for incremental adjustments. You'll get best results after cropping (to my experience) and there is no need to bother with the "Fisheye Parameter" settings. By not using the "Seam Correcting" feature, you will likely get a distinct line in areas of lighting difference or misalignment of the two hemispheres. For me, this line is easier to correct in an image editor than is a wide blurry area.

I hope I made sense, it's been a long day of work and classes. Let me know if something doesn't make sense to you.

Hans


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2002-10-30
#6

BTW, thanks for reminding me that I need to start working out  ;-) Snowboarding will begin soon here and I need to get in shape so that I don't injure a knee or a neck!

Regards,

Hans


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2002-10-30
#7

Yes, I too see the dark seam area. This is the joining precision area of the two hemispheres.  Also tilt down and see the top of your tripod.  It is out of round or not a perfect circle. 

If it were a completly round circle then you have found the correct lens nodal point.  The KEY to any panorama is to make that tripod cap a full complete circle.  This requires the camera lens to be at the correct location over the point of tripod rotation.  Did you move your locking screw to the FE 1 position?  There are actually 2 Fisheye positions 1 for the mode FE 1 and FE 2.  I think there is a small 4mm distance difference.  Using the Kaidan Kiwi 990 pan head and the Nikon 5000 cradle block helps keep the camera lens 'tilt down' absolutely LEVEL when shooting the LEFT hemisphere.. then on rotation to the RIGHT hemisphere - you need to LEVEL again and take the second shot.

We use a Nikon 990 on a Kiwi990 head and found that the pan head marked postions for the nodal point are not always correct.  We had to move the camera forward 10mm in order to obtain a tripod cap full circle, which made for a better 3 shot stitch (using PhotoVista) with NO banding or joining marked areas.

Will certainly be glad when Panoweaver 3 shot stitching software is released.

Dave


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