Lightroom/Camera Raw: Photomerge doesn't recognize built-in lens profiles

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  • Updated 12 months ago
  • (Edited)
When stitching a panorama in LR Classic's Photomerge, it reports "Unable to match a lens profile automatically..." even though (a) the lens has a built-in profile (m4/3, Panasonic 14-140), (b) the develop module reports that the built-in profile is applied to all the source images, and (c) pre-Classic LR never had any such problem.

This seems like a bug.
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Tom Fiddaman

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Posted 12 months ago

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Arjun Haarith, Employee

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Hi Tom,

Could you please share your system information ? Also were these happening during GPU On/Off ?
If possible could you please share a small video of the issue that you are facing, and message me those files/images.
Since you say it looks good in Pre classic, we have to investigate the issue in classic.

Thanks,
Arjun 
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Tom Fiddaman

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I'm not at that computer right now, but will do ASAP.

I suspect that hardware is not the issue, because I just switched systems and the problem occurred on both sides. My old system was an i7-2600s with 8GB and GPU off. My new system is an i7-4790 with 16GB and GPU on (Nvidia K620). Both are Win10.

I noticed this immediately with the introduction of Classic because I tested Photomerge to see if it was faster. However, my usage of Photomerge is intermittent, so it's possible that it crept into one of the last pre-Classic versions first.

Stay tuned...
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Kanheiya Agrawal, Employee

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Hi Tom, 

Are you trying to merge jpg files?

-Kanheiya
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Tom Fiddaman

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Nope. They're raw (.orf).

I spent a little time experimenting today, with strange results. I re-merged some older panoramas from a couple years ago, and they were ok. Then I shot a new one today (same camera & lens), and that worked too. So, it seems to be just a particular set of files that's having this problem.
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Arjun Haarith, Employee

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Hi Tom,

Any special thing associated with those particular files ?
Could you please share them, so that we can investigate as to why the merge process failed only for those.

Thanks,
Arjun
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Tom Fiddaman

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No, that's the odd thing. I'll upload them, or if size is a problem, link them from dropbox or something.
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Tom Fiddaman

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I've uploaded the relevant .orf files here:

https://www.dropbox.com/sh/lkrryjg60ahdnqm/AAB_JXCjbmyxmwWD3VWPLqVDa?dl=0

There are two pairs, both from the same camera & lens. They (inadvertently) do differ in focal length however.

If I merge the bird print, no warning. If I merge the sky shots, I get the profile warning.

I'll add some screenshots illustrating the issue in a moment.
(Edited)