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• ## Re: A first attempt to create a 360x180 degree panorama from HD video

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• ... That is correct. David
Message 1 of 17 , May 2, 2009
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erik leeman wrote:

> Looking at the diagram I got the impression the camera has to be in
> front of the rotation axis

That is correct.

David
• ... Make it 100mm then. Mine was just a guess. With a 100mm maybe you can get closer to the subject without creating uncomfortable stereo disparity, I am not
Message 1 of 17 , May 2, 2009
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Wim Koornneef wrote:

>approx. 200mm and that will be tough to handle :-(

Make it 100mm then.

Mine was just a guess.

With a 100mm maybe you can get closer to the subject without creating uncomfortable stereo disparity, I am not sure.

David
• Hello David, When reading your article about the use of StereoPhotoMaker for 3D panos I misunderstood the position of the camera and thought the rotation
Message 1 of 17 , May 3, 2009
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Hello David,

misunderstood the position of the camera and thought the rotation center
must be in front of the camera.

About the position of the camera, in front or behind the rotation center, I
guess both positions will work.
I guess as long as there is an NPP offset it dousn't matter where the camera
is placed, in front or behind the rotation center because it is the same
parallax that we normaly like to to avoid for normal panos that makes it
possible to create a 3D stereo pair when using a single camera. Could this
be true ?

The advantage of placing the camera in front of the rotation center is that
the rotator and mounting bracket is not visble in the video and hence is not
giving any footprint in the panorama.

BTW, I think it must be possible to calculate the NPP offset for a given
optimum stereo base, object distance, etc. but unfortunately I am not
comfortable with mathematics ...

Best,
Wim

David Sykes-3 wrote:
>
> erik leeman wrote:
>
>> Looking at the diagram I got the impression the camera has to be in
>> front of the rotation axis
>
>
> That is correct.
>
>
> David
>
>
>

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• On Sun, 03 May 2009 05:54:38 +0900, Wim Koornneef ... I think you have a clearly successful proof of concept demonstration! ... Yes, that is the ne plus
Message 1 of 17 , May 3, 2009
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On Sun, 03 May 2009 05:54:38 +0900, Wim Koornneef
<wim.koornneef@...> wrote:

> With the help of Frank van Dam (video footage) and Peter Murphy (advice)
> I managed to create a 360x180 degree panorama from a HD video.
>
> The HD video was shot on a EOS 5D MKII camera in portrait position,
> shaved
> Tokina 10-17@12mm lens in NPP position and a Seitz VR drive with a
> rotation speed of approx.1 rpm.

> The video mov was processed in QT Pro, rotated 90 degree and exported as
> HQ JPEG images.

> I selected 316 images that together formed a 360 degree rotation and in
> Photoshop I sharpened the images a lot, I applied a curve to enhance the
> brightness and contrast and then trimmed the images to 13 px width to get
> slices of 1920x13 px.

> (13=the image shift between each image in the sequence and 1920 px is the
> largest size of a HD video frame)
>
> In the Windows application StereoPhotoMaker I connected the slices
> (without
> any remapping/blending/optimizing/etc.) in a couple of seconds, I resized
> the output to 3840x1920 px in Photoshop and converted the
> equirectangular to a flash pano with Pano2VR.
>
> Short URL:
> http://tinyurl.com/cmocgy
>
> Long URL:
> http://www.dmmdh.nl/panos/video_panorama_02052009/video_panorama.html
>
> As you can see the result isn't so bad for a first attempt. It is clear
> that the automatic exposure of the camera is making sudden steps andeven
> with so
> many slices there are visible jagged lines (not caused by JPEG
> compression),
> there is also a person in the scene that was unharmed when passing by in
> the video but is "sliced" in the panorama and despite the sharpening the
> image is still not as crisp as it should be.

> Please keep in mind that this is a first attempt and I am sure in time we
> will develop the skills needed to create a better video (exposure,
> sharper, etc) and a better panorama (errors, junctions, etc.).

I think you have a clearly successful "proof of concept" demonstration!

> I hope you like the output, for me it is encouraging to explore more of
> the options of video for creating panoramas and the next step will be to
> create a panorama from a video shot with the same hardware but with a
> NPP off set position of the lens (shifted backwards out of NPP) to
> create a 360x180
> degree 3D stereo panorama.

Yes, that is the ne plus ultra! Go for it!

Roger W.

--
• Hello, For comparison with the sliced version I also created a stitched pano from 4 video image frames, each 90 degrees apart, When you put both versions side
Message 1 of 17 , May 3, 2009
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Hello,

For comparison with the sliced version I also created a stitched pano from 4
video image frames, each 90 degrees apart,

When you put both versions side by side in a separate (resized) browser
window they are very easy to compare.

This is the stitched pano,
http://www.dmmdh.nl/panos/video_panorama_02052009/stitched_video_panorama.html

And this is the sliced one,
http://www.dmmdh.nl/panos/video_panorama_02052009/video_panorama.html

The differences between the sliced and the stitched version are very visible
and obviously the image quality of the stitched version is much better.
The jagged lines are gone, the brightness is more equal, the star in zenith
and the lines coming from zenith are gone and the person that was passing by
and sliced is removed from the scene, all without any post editing of the
PTGui output.

Two different methods each with its own strong and weak points,
stitching/blending/optimizing gives much better results but with slicing it
is possible to handle a lot of images in a relatively short time and only
with slicing it is possible to create 3D stereo images from a single series
of image frames.

BTW, the little differences in the size of the footprint between both
versions is caused by some post processing of the equirectangular of the
sliced output.

I hope you like the comparison.

Wim

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• where is it shot. It looks familiar. ... From: Wim Koornneef Subject: Re: [PanoToolsNG] A first attempt to create a 360x180 degree
Message 1 of 17 , May 3, 2009
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where is it shot. It looks familiar.

--- On Sun, 5/3/09, Wim Koornneef <wim.koornneef@...> wrote:
From: Wim Koornneef <wim.koornneef@...>
Subject: Re: [PanoToolsNG] A first attempt to create a 360x180 degree panorama from HD video
To: PanoToolsNG@yahoogroups.com
Date: Sunday, May 3, 2009, 6:18 AM

Hello,

For comparison with the sliced version I also created a stitched pano from 4

video image frames, each 90 degrees apart,

When you put both versions side by side in a separate (resized) browser

window they are very easy to compare.

This is the stitched pano,

http://www.dmmdh. nl/panos/ video_panorama_ 02052009/ stitched_ video_panorama. html

And this is the sliced one,

http://www.dmmdh. nl/panos/ video_panorama_ 02052009/ video_panorama. html

The differences between the sliced and the stitched version are very visible

and obviously the image quality of the stitched version is much better.

The jagged lines are gone, the brightness is more equal, the star in zenith

and the lines coming from zenith are gone and the person that was passing by

and sliced is removed from the scene, all without any post editing of the

PTGui output.

Two different methods each with its own strong and weak points,

stitching/blending/ optimizing gives much better results but with slicing it

is possible to handle a lot of images in a relatively short time and only

with slicing it is possible to create 3D stereo images from a single series

of image frames.

BTW, the little differences in the size of the footprint between both

versions is caused by some post processing of the equirectangular of the

sliced output.

I hope you like the comparison.

Wim

--

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• ... The video is shot in Utrecht and I am sure Frank can tell the exact location. Wim -- View this message in context:
Message 1 of 17 , May 3, 2009
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RobLee wrote:
>
> where is it shot. It looks familiar.

The video is shot in Utrecht and I am sure Frank can tell the exact
location.

Wim

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• ... In SPM did you use the Auto Colour Adjustment to blend the image strips ? Why was auto-exposure used for image capture, does movie mode not support locked
Message 1 of 17 , May 3, 2009
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Wim Koornneef wrote:

> For comparison with the sliced version

In SPM did you use the Auto Colour Adjustment to blend the image strips ?

Why was auto-exposure used for image capture, does movie mode not support locked exposure ?

David
• http://tinyurl.com/cuk4j2 ... -- View this message in context:
Message 1 of 17 , May 3, 2009
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http://tinyurl.com/cuk4j2

Wim Koornneef wrote:
>
>
> RobLee wrote:
>>
>> where is it shot. It looks familiar.
>
> The video is shot in Utrecht and I am sure Frank can tell the exact
> location.
>
> Wim
>
>

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• Hello David, ... I guess the image strips are a little to small (13px width) to make a good color adjustment possible so I didn t try this option but I could
Message 1 of 17 , May 3, 2009
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Hello David,

David Sykes-3 wrote:
>
> In SPM did you use the Auto Colour Adjustment to blend the image strips ?
>

I guess the image strips are a little to small (13px width) to make a good
color adjustment possible so I didn't try this option but I could be wrong.
I know it is possible in SPM to set the position of the strip for making
stereo panoramas but I couldn't figure out how to set the width of the strip
for a normal (not stereo) panorama and that is why I sliced the image frames
in Photoshop.
If there is an option in SPM to slice the images for a normal panorama then
I am sure that there is enough image data for a perfect Auto Colour

David Sykes-3 wrote:
>
> Why was auto-exposure used for image capture, does movie mode not support
> locked exposure ?
>

I have no idea if it is possible to lock the exposure, I am not familiar
with the EOS 5DMKII, Frank shot the video so perhaps he can answer this
question, if not perhaps another group member can tell if exposure locking
is possible for the camera.

BTW, I also like to know if it is possible to set the amount of sharpening
and the compressing quality of the video.

Wim

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• Yup there s an exposure lock in video mode. Sacha Griffin Southern Digital Solutions LLC http://www.southern-digital.com http://www.seeit360.net GMAIL
Message 1 of 17 , May 3, 2009
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Yup there's an exposure lock in video mode.

<-*->

Sacha Griffin

Southern Digital Solutions LLC

http://www.southern-digital.com

http://www.seeit360.net

GMAIL IM: sachagriffin007@...

404-551-4275

From: PanoToolsNG@yahoogroups.com [mailto:PanoToolsNG@yahoogroups.com] On
Behalf Of Wim Koornneef
Sent: Sunday, May 03, 2009 12:09 PM
To: PanoToolsNG@yahoogroups.com
Subject: Re: [PanoToolsNG] A first attempt to create a 360x180 degree
panorama from HD video

I have no idea if it is possible to lock the exposure, I am not familiar
with the EOS 5DMKII, Frank shot the video so perhaps he can answer this
question, if not perhaps another group member can tell if exposure locking
is possible for the camera.

BTW, I also like to know if it is possible to set the amount of sharpening
and the compressing quality of the video.

Wim

[Non-text portions of this message have been removed]
• Hello Sascha, That s good news, Frank confirmed it and he will shoot some more videos (shot in offset NPP position) that I will use for creating a 360x180
Message 1 of 17 , May 3, 2009
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Hello Sascha,

That's good news, Frank confirmed it and he will shoot some more videos
(shot in offset NPP position) that I will use for creating a 360x180 degree
3D panorama.
If all goes well I will post the results later.
I expect this can take some time so when "later" is I can't tell right now.

Wim

Sacha Griffin wrote:
>
> Yup there's an exposure lock in video mode.
>
> <-*->
>

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