What parameter for image stitching with no projection  

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esox
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What parameter for image stitching with no projection

by esox » Mon Jan 27, 2014 6:39 pm

I'm trying autopano giga. I have the following process to do :

I have 58 pictures from a painting. Those picture were taken with macro lense (120 mm on Phase One system). I didn't use a panoramic gear to do it. I didn't take the picture from the same point of view. The images were shot about 40 cm away from the paintings surface. So there is almost no angle difference, no perspective difference (almost...) between those pictures. I moved the camera tripod for each shot, like if I were shoooting all the cells of an array one by one, I didn't rotate the camera around an axis. All the pictures were taken with almost the same angle with the surface of the painting. If I use rectilinear or spherical projection, all the borders of the painting are like a peace of textile stitched between 4 needles (one at each corner). All borders are curved.

The only projection that gives linear borders for the painting is "mirror ball" but it reduces a lots the resolution of the out put.

The purpose of this is to make a very high definition plane image of the painting. It will be processed after by krpano to publish it on the web with zooming into the painting possibilities.

What is the correct process for this job ?

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mediavets
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Re: What parameter for image stitching with no projection

by mediavets » Mon Jan 27, 2014 6:51 pm

esox wrote:I'm trying autopano giga. I have the following process to do :

I have 58 pictures from a painting. Those picture were taken with macro lense (120 mm on Phase One system). I didn't use a panoramic gear to do it. I didn't take the picture from the same point of view. The images were shot about 40 cm away from the paintings surface. So there is almost no angle difference, no perspective difference (almost...) between those pictures. I moved the camera tripod for each shot, like if I were shoooting all the cells of an array one by one, I didn't rotate the camera around an axis. All the pictures were taken with almost the same angle with the surface of the painting. If I use rectilinear or spherical projection, all the borders of the painting are like a peace of textile stitched between 4 needles (one at each corner). All borders are curved.

The only projection that gives linear borders for the painting is "mirror ball" but it reduces a lots the resolution of the out put.

The purpose of this is to make a very high definition plane image of the painting. It will be processed after by krpano to publish it on the web with zooming into the painting possibilities.

What is the correct process for this job ?

Welcome to the forum.

APP/APG is not designed to stitch this sort of image set.

But you could try manually setting a much longer focal length and also make sure you use the Multiple viewpoint option.

I believe Microsoft ICE is said to be able to handle this sort of image set:

http://research.microsoft.com/en-us/um/ ... s/ivm/ICE/
Attachments
1-apg308-multi-viewpoint.jpg

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esox
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Re: What parameter for image stitching with no projection

by esox » Mon Jan 27, 2014 7:25 pm

Thanks, yes Microsft ICE seems to be the correct tool. Do you know if there is another software like ICE ?

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mediavets
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Re: What parameter for image stitching with no projection

by mediavets » Mon Jan 27, 2014 7:34 pm

esox wrote:Thanks, yes Microsft ICE seems to be the correct tool. Do you know if there is another software like ICE ?


I believe some have used Photoshop and other have said that Canon's old PhotoStitch software may handle this sort of image set.

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Re: What parameter for image stitching with no projection

by klausesser » Mon Jan 27, 2014 7:57 pm

esox wrote:What is the correct process for this job ?



The correct process is the use of a "robotic" head providing XML files and a tele-lens.

Can you re-do the shoot? A manual NPP-head also will work. NodalNinja for example.

I doubt you will get a good stitch from the shots you did.

The head assures you to get correctly adjacent and therefore stitchable images, the tele-lens privides
a "flat" angle. Depending on the overall size of the image i suggest 100 - 200mm, preferably no zooms.

See here - click thje green dot under the "round" and gold-framed picture and zoom in: http://360impressions.de/MKP_TOUR/
I shot this picture using a 85mm @ 3m distance with my Panoneed head. The rest of the tour i shot with 35mm and the Panoneed.

Klaus

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esox
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Re: What parameter for image stitching with no projection

by esox » Mon Jan 27, 2014 9:15 pm

Thanks for the answers.

I'm not trying to make a 360° pano. I'm trying to that the best way possible (this was done on autopano giga but the limitations explained above - I had to straighten the borders in Photoshop): http://photo.jeanmartinbarbut.fr/images/repros/anne_francais/Francais-HD_web.html

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mediavets
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Re: What parameter for image stitching with no projection

by mediavets » Mon Jan 27, 2014 9:34 pm

esox wrote:Thanks for the answers.

I'm not trying to make a 360° pano.

We know that - none of the answers assumed you were.

I'm trying to that the best way possible (this was done on autopano giga but the limitations explained above - I had to straighten the borders in Photoshop): http://photo.jeanmartinbarbut.fr/images/repros/anne_francais/Francais-HD_web.html

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Re: What parameter for image stitching with no projection

by klausesser » Mon Jan 27, 2014 10:15 pm

esox wrote:Thanks for the answers.

I'm not trying to make a 360° pano. I'm trying to that the best way possible (this was done on autopano giga but the limitations explained above - I had to straighten the borders in Photoshop): http://photo.jeanmartinbarbut.fr/images/repros/anne_francais/Francais-HD_web.html



I´m afraid you misunderstood: the painting in the golden, round passepartout with the green dot under it is NOT a pano. It´s just INCLUDED IN the pano.
It´s exactly what you asked for.

Didn´t you look at it?

here outside the pano:
http://www.360impressions.de/MKPBild1/
http://www.360impressions.de/MKPBild2/

Use the "+" and "-" buttons for zooming in and out and use your mouse or keys for panning

Klaus

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klausesser
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Re: What parameter for image stitching with no projection

by klausesser » Mon Jan 27, 2014 10:19 pm

esox wrote:Thanks for the answers.

I'm not trying to make a 360° pano. I'm trying to that the best way possible (this was done on autopano giga but the limitations explained above - I had to straighten the borders in Photoshop): http://photo.jeanmartinbarbut.fr/images/repros/anne_francais/Francais-HD_web.html



I suggest to limit the zoom to 100% resp. 1:1. Zooming in completely your image isn´t sharp.

Klaus


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