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Luigi Pirandello

Posts: 185
Location: Italy
Registered: 14 Aug 2010
resize panorama image: correct workflow
Posted: 27 Nov 2012 at 15:45 GMT
hi, i would like to share my resize workflow to get some suggestion.

1) finished pano image in 16 bit tiff format with ps level, without compression and without sharpness;

2) sharpness oparation (i use nik software tool)

3) save the file in 16 bit tiff format without compression and without level

4) drag and drop this file (16bit tiff) in panotour pro/krpano setting cube size to 2200 and tiles to 0, jpeg quality to 8/10 to get a complessive panorama directory of 2mb.

what do you think? is it correct to resize by krpano/kolor panotour?
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Henri Smeets

Posts: 263
Location: Amsterdam, Netherlands
Registered: 28 Nov 2006
Re: resize panorama image: correct workflow
Posted: 27 Nov 2012 at 15:55 GMT
I assume you're talking about an equirectangular image.

The workflow seems OK, let the results speak for itself I'd say.

The only thing I tend to be careful with is sharpening an equi-image, specially in the stretched parts of the image (top and bottom 25%) I try to avoid sharpening because it gives unwanted effects when the images is converted to cube faces.

I prefer to do the sharpening before stichting. Perhaps a little in the central image later on, usually the KRPano render-sharpening is sufficient though.

I hope this helps you!
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Luigi Pirandello

Posts: 185
Location: Italy
Registered: 14 Aug 2010
Re: resize panorama image: correct workflow
Posted: 4 Dec 2012 at 16:33 GMT
updated: 4 Dec 2012 at 16:38 GMT

Henri Smeets said:

I assume you're talking about an equirectangular image.

The workflow seems OK, let the results speak for itself I'd say.

The only thing I tend to be careful with is sharpening an equi-image, specially in the stretched parts of the image (top and bottom 25%) I try to avoid sharpening because it gives unwanted effects when the images is converted to cube faces.

I prefer to do the sharpening before stichting. Perhaps a little in the central image later on, usually the KRPano render-sharpening is sufficient though.

I hope this helps you!

thanks for the replay.
Infact i have notice concentric halos on the sky when improve the sharpness.

so you suggest to applied sharpness only on the center of pano and before the stitching: do you apply sharpness on raw file?

about "KRPano render-sharpening is sufficient though.": does krpano apply sharpness when convert equirettangolar tiff in jpeg cube faces?

My exaple
From a tiff of 333MB (10796 x 5398)
www.photospherical.it/VT/Prove/1600_0_5/build.html (1,8MB)
www.photospherical.it/VT/Prove/1600_0_7/build.html (2,26 MB)
www.photospherical.it/VT/Prove/2200_0_5/build.html (3,10 MB)
www.photospherical.it/VT/Prove/2200_0_7/build.html (3,8 MB)

i think that the cube faces are too big.
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nvlass

Posts: 52
Location: Hersonisos, Crete, Greece, Greece
Registered: 14 Feb 2010
Re: resize panorama image: correct workflow
Posted: 5 Dec 2012 at 20:59 GMT
updated: 5 Dec 2012 at 21:01 GMT
Hi Luigi, I just check the panoramas with my ipad and they look really nice actually I don't see any difference in my ipad at least exept that the larger takes a little more time to load

I an also confuse what workflow is the best I am working with the panotour pro
First I stitch the images with ptgui and then I edit them like tiff with lightroom and photoshop after that I am exporting them for panotour 5000x2500
I have big sizes like 14 mb per pano I don't understand what I am doing wrong. You wrote 0 tiles why is that I leave it at the default at 800
Any help will be nice also
Nikos
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John Houghton

Posts: 3935
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
Re: resize panorama image: correct workflow
Posted: 6 Dec 2012 at 7:05 GMT

Luigi PirandelloInfact i have notice concentric halos on the sky when improve the sharpness.[/quote said:

Be selective. Don't sharpen the sky as this only emphasizes any noise that might be present.

John
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Luigi Pirandello

Posts: 185
Location: Italy
Registered: 14 Aug 2010
Re: resize panorama image: correct workflow
Posted: 6 Dec 2012 at 17:05 GMT

nvlass said:

Hi Luigi, I just check the panoramas with my ipad and they look really nice actually I don't see any difference in my ipad at least exept that the larger takes a little more time to load

I an also confuse what workflow is the best I am working with the panotour pro
First I stitch the images with ptgui and then I edit them like tiff with lightroom and photoshop after that I am exporting them for panotour 5000x2500
I have big sizes like 14 mb per pano I don't understand what I am doing wrong. You wrote 0 tiles why is that I leave it at the default at 800
Any help will be nice also
Nikos


Two pano with same cube face size (Ex. 2200) one with no tiles and the other with tiles (your ex. 800) haven't same size in mb. tiles incrasede pano eavy.
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nvlass

Posts: 52
Location: Hersonisos, Crete, Greece, Greece
Registered: 14 Feb 2010
Re: resize panorama image: correct workflow
Posted: 6 Dec 2012 at 21:23 GMT
I will try that and I will inform here
Thanks
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nvlass

Posts: 52
Location: Hersonisos, Crete, Greece, Greece
Registered: 14 Feb 2010
Re: resize panorama image: correct workflow
Posted: 7 Dec 2012 at 6:54 GMT
I am little confuse where do I put the tiles size mine in the Panotour Pro has the
1) Cube Face Size
2) Cutting Size
3) Max Preview size
4) Jpeg Quality

Which numbers are necessary so I will have the best possible quality with the smallest possible size?
We are talking for projects with 10 or 50 panoramas
Thanks
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Luigi Pirandello

Posts: 185
Location: Italy
Registered: 14 Aug 2010
Re: resize panorama image: correct workflow
Posted: 7 Dec 2012 at 11:02 GMT
updated: 7 Dec 2012 at 11:03 GMT
if you have created a vt with panotour pro with ipad compatibility, on ipad the size of pano is always the same.

cube face size (the dimension of cube face in piel, in generaly i use 1600 or 2200 px)
Cutting Size (it is the size of tiles, generally i use 0)
Max previe size (is the size of previw, you can leave the default number 800)
Jpeg Quality: you have to test. Start with 10 and go down until you get best result in term of qualiy-mb.


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about "KRPano render-sharpening is sufficient though."?????
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nvlass

Posts: 52
Location: Hersonisos, Crete, Greece, Greece
Registered: 14 Feb 2010
Re: resize panorama image: correct workflow
Posted: 7 Dec 2012 at 16:41 GMT
Luigi I test your panoramas everyone and I have them open on my Dell U2711
the last one has the best detail BUT in my opinion there is no so much difference
They look really nice except some Purple fringing on the left up
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Luigi Pirandello

Posts: 185
Location: Italy
Registered: 14 Aug 2010
Re: resize panorama image: correct workflow
Posted: 11 Dec 2012 at 10:19 GMT
hi, thanks for you opinion!! i'm trying to improve my know how about color correction to evitate abberraction chromatic error.

So 1.8 mb is a good pano. is possible to get more quality remaing under 2 MB?
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Luigi Pirandello

Posts: 185
Location: Italy
Registered: 14 Aug 2010
Re: resize panorama image: correct workflow
Posted: 25 Feb 2013 at 11:07 GMT
nothing?
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baimage

Posts: 1
Location:
Registered: 28 May 2013
Re: resize panorama image: correct workflow
Posted: 28 May 2013 at 9:15 GMT
it is working well of the workflow, i have some c# image resize codes i want to share, have a look at:www.rasteredge.com/how-to/csharp-imaging/resize-i...
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