Re: [PTGui] Color shift in image

[PTGui Support]

Hi John,

Your post was caught by Google Groups' spam filter, apologies for the
delay with which it appears in the forum.

This must be a color profile problem. I'm not sure how Pano2VR deals
with color management but if you make anything for the web it's best to
convert your images to sRGB profile. You can do this in Photoshop for
example (I think it's Edit -> Convert to Profile).

PTGui will preserve the color profile of your source images as long as
you are not tone mapping or exposure fusing in PTGui.

Kind regards,

New House Internet Services BV
Joost Nieuwenhuijse

-----------------------------------------------
PTGui - Photo Stitching Software

www.ptgui.com
For support see: http://www.ptgui.com/faq/
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On 10/16/13 8:48 PM, John Ivy wrote:
> Hi.
>
> I have Pano 2VR, ver: 4.1.0 pro 64bit.
>
> I've done a few panoramas with it, and am learning.
>
> I have one big problem with it, however.
>
> When I drop my panos into Pano 2VR, it creates smaller jpeg preview
> copies that I assume it uses to create the Flash and HTML5 panoramas.
>
> All that is fine but, when it does that, it causes a huge color shift in
> the image. Adds contrast as well.
>
> I've tried different ways of inputting my panoramas, but it seems to
> make no difference.
>
> The images I am trying to use are tiff files with LZW compression, 200
> to 300 megs each, if that makes a difference.
>
> So, how do I drop my panoramas into Pano 2VR and keep my color balance
> true to the original?
>
> I really need to make this work.
>
> Please see attached files.
>
> Thanks for your help...
>
> John
>
>
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[PTGui Support]

..or alternatively you could assign the color profile of your source
images to the Pano2VR generated image. This can be done in Photoshop
using Assign Profile. Keep in mind though that some Flash panorama
players are not color profile aware, and they will display your panorama
in the sRGB (or close to that) color space, hence my earlier remark.

Joost

[John Ivy]

Hi Joost,

After reading your post, I went into Photoshop to check it out.

I have been using "Pro Photo RGB" color profile. When I went into Assign Profile and changed it to "sRGB", there was that blue/purple cast I've been experiencing. I then went into "Convert to Profile" and changed my "Pro Photo RGB" to "sRGB" and it did it without a color shift.

I believe that was my problem, and I don't think I would have figured it out anytime soon on my own. So thank you very much, my friend!

Just tried the sRGB image in Pano 2VR and sure enough, no color shift.

Thanks again, Joost.

Kind regards,

John