SteinRK
Posts: 4
Location:
Registered: 17 Mar 2006
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Orthographic / linear panorama of a floor
Posted: 24 Apr 2008 at 8:16 GMT
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I would like to make an orthographic / linear panorama of a large floor covered with tiles in different patterns.
Does anyone have a tip how this can be done.
I can't see how to do this in PTGui. Can the Viewpoint Correction in PTGui Pro be used or do I have to tweek every picture in PS....
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DorinDXN
Posts: 1650
Location: Timisoara, Romania
Registered: 14 Nov 2006
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SteinRK
Posts: 4
Location:
Registered: 17 Mar 2006
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Re: Orthographic / linear panorama of a floor
Posted: 24 Apr 2008 at 9:03 GMT
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Dorin: I have seen this tutorial, but I'm not sure it will work.
All the pictures taken of the floor will have a perspective issue in them since they will be taken with the camera tilted 20-30 degrees toward the floor. I will not be able to take the pictures perpendiculare to the floor.
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Rosauro
Posts: 230
Location: Toronto, Canada
Registered: 15 Dec 2006
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Re: Orthographic / linear panorama of a floor
Posted: 24 Apr 2008 at 9:31 GMT
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Use a pole standing on an angle with the camera pointing directly downwards towards the ground.
Make a camera mount that swivels letting gravity level the camera pointing it directly downwards.
Use a remote shutter release.
Use a rectilinear lens.
To make this more technical, if you want, you could even add a video downlink so you could see what the camera is seeing.
Be mindful of the source of light and shadows caused by the pole.
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gus
Posts: 378
Location: United Kingdom
Registered: 19 Jun 2007
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Re: Orthographic / linear panorama of a floor
Posted: 24 Apr 2008 at 15:50 GMT
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SteinRK said: Dorin: I have seen this tutorial, but I'm not sure it will work.
All the pictures taken of the floor will have a perspective issue in them since they will be taken with the camera tilted 20-30 degrees toward the floor. I will not be able to take the pictures perpendiculare to the floor.
just a guess because I've never played with it, but what if you correct the individual images for perspective distortion in CS3, and then stitch them together?
gus
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irieman
Posts: 133
Location: East Sussex, United Kingdom
Registered: 8 Jul 2006
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Re: Orthographic / linear panorama of a floor
Posted: 24 Apr 2008 at 16:01 GMT
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see this thread on PTMac forum - www.kekus.com/forum/showthread.php?t=1969&highlight=push+broom
AFAIK this isn't something that stitching software copes with very well - you would be better to make a wheeled dolly that you could run up and down shooting at regular intervals and then place and correct in PS.
I have made a satisfactory stitch of about half a mile of coastline just by aligning the images in PT Editor - but that was foliage mainly and very forgiving on stitches - with something like a floor I think that you would need to make a fairly precise rig. The more accurate you are at the capture stage the less time in PS unfortunately 
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Doug Aurand
Posts: 552
Location: Albuquerque, NM, United States
Registered: 2 Jan 2008
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Re: Orthographic / linear panorama of a floor
Posted: 27 Apr 2008 at 14:58 GMT
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RealViz Stitcher Unlimited can "Flat Stitch"
The funtion is made to stitch oversized images that are to big to be scanned as one image on a typical flatbed scanner. Like an old map or something
If you can shoot the scene with almost no perspective, RVSU may be able to do the job.
Doug Aurand
Albuquerque, NM
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Tim Eastman
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Registered: 15 Nov 2006
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