Dark EXR Update - more information and a comparison
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Bob
Feb 28, 2014, 6:54:44 AM2/28/14
to pt...@googlegroups.com
Hi
I ran the HDR Pano through PTGui again generating a LDR TIFF layer for each of the five exposures, a TIFF of the HDR generated by PTGui and the EXR file.
I then used the 5 TIFF files, one for each EV, and generated an HDR using NIK HDR EFEX PRO 2.
The results:
My conclusion:
I have something that I set wrong somewhere in PTGui, something I did recently since this color space mismatch never happened before, that messed up the color space used by PTGui. Additionally the mismatched colors are both listed as Adobe 1998!
How can I check / adjust this?
What can I post to help illustrate the problem - the EXR file is big but I could show a JPG of the EXR after import into Photoshop along with the JPG generated by PTGui.
Is there a viewer/editor I can use to fully describe the color space incorporated into the PTGui HDR file?
I realize that the suggestion is the image is fine - gut I have never seen Photoshop.Nik HDR say the color space doesn't match and require a color trnsformation.
I do have a solution now - run PTGui as before but ignore or skip the HDR output file and put the exposure LDR layer files into HDR EFEX PRO to generate an HDR file. Mght be just as good or perhaps a better soution since NIK HDR provides both ghost removal tools and color aberration tools.
I ran the HDR Pano through PTGui again generating a LDR TIFF layer for each of the five exposures, a TIFF of the HDR generated by PTGui and the EXR file.
I then used the 5 TIFF files, one for each EV, and generated an HDR using NIK HDR EFEX PRO 2.
The results:
- Viewed in Bridge the PTGUI EXR and TIFF file of the HDR look identical the the HDR generated by NIK HDR EFX PRO 2
- Importing the NIK HDR into Photoshop for rendering using NIK HDR - the picture looked the HDR file looked the same and no color change was needed.
- Importing the PTGui EXR file into Photoshop brought up a message that the PTGui color space- Adobe 1998 - did not match the working color space - the same Adobe 1988.Hitting OK resulted in a color transformation resulting in a very dark, useless image. The image cannot be properly rendered.
My conclusion:
I have something that I set wrong somewhere in PTGui, something I did recently since this color space mismatch never happened before, that messed up the color space used by PTGui. Additionally the mismatched colors are both listed as Adobe 1998!
How can I check / adjust this?
What can I post to help illustrate the problem - the EXR file is big but I could show a JPG of the EXR after import into Photoshop along with the JPG generated by PTGui.
Is there a viewer/editor I can use to fully describe the color space incorporated into the PTGui HDR file?
I realize that the suggestion is the image is fine - gut I have never seen Photoshop.Nik HDR say the color space doesn't match and require a color trnsformation.
I do have a solution now - run PTGui as before but ignore or skip the HDR output file and put the exposure LDR layer files into HDR EFEX PRO to generate an HDR file. Mght be just as good or perhaps a better soution since NIK HDR provides both ghost removal tools and color aberration tools.
PTGui Support
Feb 28, 2014, 9:40:40 AM2/28/14
to pt...@googlegroups.com
Hi Bob,
I guess the size of the images will not matter for the problem. Just
create a 500 x 500 .exr file and make that available. Please add some
screenshots illustrating the problem.
Please do not add attachments to your posts; instead upload your files
at a file sharing site (for example http://ge.tt/ ) and include a link
in your message.
Joost
On 28/02/2014 12:54, Bob wrote:
> Hi
>
> I ran the HDR Pano through PTGui again generating a LDR TIFF layer for
> each of the five exposures, a TIFF of the HDR generated by PTGui and the
> EXR file.
>
> I then used the 5 TIFF files, one for each EV, and generated an HDR
> using NIK HDR EFEX PRO 2.
>
> *The results:*
>
> * Viewed in Bridge the PTGUI EXR and TIFF file of the HDR look
> messed up the color space used by PTGui. *Additionally the mismatched
> colors are both listed as Adobe 1998*!
> --
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> in your message.
> For more options, visit this group at http://groups.google.com/group/ptgui
>
> ---
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I guess the size of the images will not matter for the problem. Just
create a 500 x 500 .exr file and make that available. Please add some
screenshots illustrating the problem.
Please do not add attachments to your posts; instead upload your files
at a file sharing site (for example http://ge.tt/ ) and include a link
in your message.
Joost
On 28/02/2014 12:54, Bob wrote:
> Hi
>
> I ran the HDR Pano through PTGui again generating a LDR TIFF layer for
> each of the five exposures, a TIFF of the HDR generated by PTGui and the
> EXR file.
>
> I then used the 5 TIFF files, one for each EV, and generated an HDR
> using NIK HDR EFEX PRO 2.
>
>
> * Viewed in Bridge the PTGUI EXR and TIFF file of the HDR look
> identical the the HDR generated by NIK HDR EFX PRO 2
> * Importing the NIK HDR into Photoshop for rendering using NIK HDR -
> the picture looked the HDR file looked the same and no color change
> was needed.
> * Importing the PTGui EXR file into Photoshop brought up a message
> was needed.
> that the PTGui color space- Adobe 1998 - did not match the working
> color space - the same Adobe 1988.Hitting OK resulted in a color
> transformation resulting in a very dark, useless image. The image
> cannot be properly rendered.
>
>
> *My conclusion:*
> color space - the same Adobe 1988.Hitting OK resulted in a color
> transformation resulting in a very dark, useless image. The image
> cannot be properly rendered.
>
>
> I have something that I set wrong somewhere in PTGui, something I did
> recently since _this color space mismatch never happened before_, that
> messed up the color space used by PTGui. *Additionally the mismatched
> colors are both listed as Adobe 1998*!
>
> How can I check / adjust this?
>
> What can I post to help illustrate the problem - the EXR file is big but
> I could show a JPG of the EXR after import into Photoshop along with the
> JPG generated by PTGui.
>
> Is there a viewer/editor I can use to fully describe the color space
> incorporated into the PTGui HDR file?
>
> I realize that the suggestion is the image is fine - gut I have never
> seen Photoshop.Nik HDR say the color space doesn't match and require a
> color trnsformation.
>
> I do have a solution now - run PTGui as before but ignore or skip the
> HDR output file and put the exposure LDR layer files into HDR EFEX PRO
> to generate an HDR file. Mght be just as good or perhaps a better
> soution since NIK HDR provides both ghost removal tools and color
> aberration tools.
>
>
> --
> How can I check / adjust this?
>
> What can I post to help illustrate the problem - the EXR file is big but
> I could show a JPG of the EXR after import into Photoshop along with the
> JPG generated by PTGui.
>
> Is there a viewer/editor I can use to fully describe the color space
> incorporated into the PTGui HDR file?
>
> I realize that the suggestion is the image is fine - gut I have never
> seen Photoshop.Nik HDR say the color space doesn't match and require a
> color trnsformation.
>
> I do have a solution now - run PTGui as before but ignore or skip the
> HDR output file and put the exposure LDR layer files into HDR EFEX PRO
> to generate an HDR file. Mght be just as good or perhaps a better
> soution since NIK HDR provides both ghost removal tools and color
> aberration tools.
>
>
> --
> You received this message because you are subscribed to the Google
> Groups "PTGui" group.
> To post to this group, send email to pt...@googlegroups.com
> To unsubscribe from this group, send email to
> ptgui+un...@googlegroups.com
> Please do not add attachments to your posts; instead upload your files
> at a file sharing site (for example http://ge.tt/ ) and include a link
> in your message.
> For more options, visit this group at http://groups.google.com/group/ptgui
>
> ---
> You received this message because you are subscribed to the Google
> Groups "PTGui Support" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to ptgui+un...@googlegroups.com.
> For more options, visit https://groups.google.com/groups/opt_out.
Bob
Feb 28, 2014, 1:21:37 PM2/28/14
to pt...@googlegroups.com
Hi Joost
I think I found an issue with Photoshop. It is not identifying the color space in EXR files correctly. I went back to some old EXR files produced by PTGui where I had no problem in the past and the same issue cropped up. Regardless what Color Space I changed Photoshop to be, it said the files had different color spaces but listed each space as the color space I set in photoshop. It then did a conversion producing a dark, unusable file.
Let me try fixing Photoshop -probably a reinstall, and see what happens.
Thanks for offering your hekp. You are terrific.
I think I found an issue with Photoshop. It is not identifying the color space in EXR files correctly. I went back to some old EXR files produced by PTGui where I had no problem in the past and the same issue cropped up. Regardless what Color Space I changed Photoshop to be, it said the files had different color spaces but listed each space as the color space I set in photoshop. It then did a conversion producing a dark, unusable file.
Let me try fixing Photoshop -probably a reinstall, and see what happens.
Thanks for offering your hekp. You are terrific.
Bob
Feb 28, 2014, 4:49:29 PM2/28/14
to pt...@googlegroups.com
Well the problem was something I did to Photoshop Joost. I feel bad taking up you rtime and rally appreciate your help.
I had the color setting set for what I thought was Adobe RGB in Photoshop but when I made that change from Prophoto RGB a week ago I must have set something else in error. I reset Photoshop color to the default and all works fine. I will do some additional reading on setting the color space in photoshop to prophoto again and test the exr files to make sure they go in OK.
Overall I did feel that generating the LDR TIFF planes and using HDR EFEX PRO to create the HDR output offered some added capability so I may adopt that work flow in the future, using PTGUI HDR linked images to generate stitched tiff files for each exposre and then using HDR EFEX PRO 2 to create the EXR file.
Again, I apologize for taking up you time and appreciate your suggestions and offer to help.
Bob Bryer
I had the color setting set for what I thought was Adobe RGB in Photoshop but when I made that change from Prophoto RGB a week ago I must have set something else in error. I reset Photoshop color to the default and all works fine. I will do some additional reading on setting the color space in photoshop to prophoto again and test the exr files to make sure they go in OK.
Overall I did feel that generating the LDR TIFF planes and using HDR EFEX PRO to create the HDR output offered some added capability so I may adopt that work flow in the future, using PTGUI HDR linked images to generate stitched tiff files for each exposre and then using HDR EFEX PRO 2 to create the EXR file.
Again, I apologize for taking up you time and appreciate your suggestions and offer to help.
Bob Bryer
On Friday, February 28, 2014 9:40:40 AM UTC-5, PTGui Support wrote:
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