panorama software,virtual tour software
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Joined: 2007-02-28
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2008-02-07
#1

Top stitching on light surfaces

Hi, I have found that when I do a panorama with a light ceiling, the ceiling appears a darker shade so you can clearly see the stitching lines.

http://www.panovision360.co.uk/studio250108.htm

For this shot above the camera had the white balance pre-set with a grey card, the ISO set to '100' and the Auto ISO switched off . Can anyone offer any advice on this. Thank you. Steve


Nikon D40x + Nikon 10.5mm fisheye + Nodal Ninja 3 + lots of patience
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Joined: 2007-10-04
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2008-02-07
#2

I believe you need to lock auto exposure so they are more uniform... Have you tried smartblend plug in?

DaMan


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2008-02-07
#3

It seems better when I use .jpg images to stich rather than Raw files. Could it be that the Raw files are too sensitive?


Nikon D40x + Nikon 10.5mm fisheye + Nodal Ninja 3 + lots of patience
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2008-02-07
#4

This is a result of light fall off (vignetting) and/or the way light is entering the fisheye lens. Based on the slight issue's of your panorama using Smartblend would absolutely rectify your obvious Zenith & Nadir tiles.

Also do not process tiles to the edges.

Download the Smartblend Plug-in, install and restitch the images and compare.

Regards, Smooth


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2008-02-07
#5

Looking at it again something is worrying me about your workflow.

Can you explain your steps from start to finish?

Regards, Smooth


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2008-02-07
#6

Hi Smooth, This is my workflow.

  • Import Raw images into Panoweaver 5 (latest version).
  • Pre stitch.
  • Stitch.
  • Panoramic Image Size set to 'Cubic Panorama' with 'CD quality' (for that little extra:)).
  • Save the .tiff file and open in Capture NX.
  • Make any changes to the lighting on the whole .tiff image.
  • Import the corrected image back to Panoweaver and publish.

Many thanks Smooth,

Steve


Nikon D40x + Nikon 10.5mm fisheye + Nodal Ninja 3 + lots of patience
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2008-02-07
#7

Steve,

I think you are making the mistake when you publish to cubic and then modify in Capture NX.

I really suggest you install Smartblend and export in Spherical format, edit in Capture NX and then import back to Panoweaver and publish. If you really want cubic do that after colour correction.

I assume you are exporting to cubic to touch up the Zenith star and Nadir tripod patching? If so, that is fine but do not do colour correction or sharpening in cubic mode only the patching. If you use .tif format from Cubic to Spherical and back to Cubic again etc you will not lose much (in quality) as .tif it is a non lossy format.

My workflow is more like this:

  • Raw images processed with Adobe Camera RAW (ACR) to correct Vignetting & Chromatic Aberration something Panoweaver cannot do. Export to .tif image format.
  • Import .tif images into Panoweaver 5
  • Set size to output to something I know is around the "real" maximum of the stitched image Custom usually but 6000x3000 (Canon 5D and Sigma 8mm) or 10000x5000 (Canon 5D and Canon 15mm) is close enough.
  • Stitch to Cubic, export in .tif format and patch Nadir and Zenith as needed in Photoshop and save.
  • Import .tif back to Panoweaver 5 and convert to Spherical projection.
  • Export .tif image and do final colour adjustments and any other needed corrections including sharpening in Photoshop save as .tif.
  • Import final corrected .tif and sharpened image and publish.

Hope this helps.

Regards, Smooth 


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2008-02-07
#8

Hi Smooth,
I have pin-pointed the problem. You were right it is the modification in Capture NX. To anyone who uses this program, DO NOT adjust the D-Lighting to 'Better Quality".
Thanks once again Smooth for your invaluable advice.  Steve


Nikon D40x + Nikon 10.5mm fisheye + Nodal Ninja 3 + lots of patience
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2008-02-08
#9
I have been using the free plugin for Photoshop from Ruen Spanns for flawless spherical to cubic to spherical conversion. It can be downloaded here for free.
Nikon D300, D3s, Nikon 10.5 lens, RingT105N+Footplate+MrotatorTCPs, Giottos MT9261 Tripod, Manfrotto 410 Jr geared head.

If you know the "secret" then everyday is a good day!