Temperature metadata

LisaTedeschi · February 02, 2019, 05:06:17 PM

Hello to everyone.
I am currently working on Windows 7 HP with ExifTool version 11.2.5.0, processing .JPG pictures from camera traps for wildlife studies. I would like to extract the ambient temperature (and possibly the moon phase) from the metadata of the pictures; I know the cameras record them as they get watermarked onto the pictures. We have different models of cameras (Reconyx, Bushnell, Moultrie and ScoutGuard) and I'll upload a picture from every camera model. IMG_0001 is a Moultrie, IMG_0002 is a Reconyx (that didn't experienced problems) and IMG_0003 is also a Reconyx (that experienced problems in storing date and time, see below), IMG_0004 is a ScoutGuard, IMG_0005 is a Bushnell and IMG_0006 is an unknow model.
In some of the pictures, the temperature information is stored in the "comment" section (like in IMG_0003). I extracted the T° from that pictures thanks to FAQ#12, but in the others pictures I couldn't. I would like to know if it is an information that is not stored in the metadata (as another user already experienced: https://exiftool.org/forum/index.php/topic,9383.msg48543.html#msg48543 ) or if I'm not able to find it.
"fun fact": the only picture from I could extract this information is one of the pictures that experienced problems storing date and time ( https://exiftool.org/forum/index.php/topic,9834.0.html ).

Thanks for the attention and sorry if I'm asking dumb questions - I'm still a newbie of this world.

Best regards,
Lisa Tedeschi

Alan Clifford · February 02, 2019, 05:18:43 PM

I download one of the photos. Have these been edited as there is this tag:

Code Select

[XMP]           History Software Agent          : Adobe Photoshop Camera Raw 11.0, Adobe Photoshop Camera Raw 9.7 (Windows)

Do you have the original photographs as editing software sometimes destroys information.

Alan Clifford · February 02, 2019, 05:22:11 PM

I'm also seeing this:

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[ExifTool] Warning : [minor] Unrecognized MakerNotes

If there is data in there, I'm afraid it's beyond by skill level.

LisaTedeschi · February 02, 2019, 05:46:25 PM

Hi Alan, thanks for answering.
Yes, I used AdobeBridgeCC to tag the pictures.

Quote from: Alan Clifford on February 02, 2019, 05:18:43 PM

Do you have the original photographs as editing software sometimes destroys information.

Yes, here is IMG_0007 that has not been processed through AdobeBridgeCC, and IMG_0008 that was processed. I can actually see in both images the metadata I was looking for (temperature and moon phases), but not in the others pictures I uploaded before.

Best regards,
Lisa Tedeschi

Alan Clifford · February 02, 2019, 05:55:58 PM

Do you have the original for 0005?

LisaTedeschi · February 02, 2019, 05:58:40 PM

Dear Alan,

Quote from: Alan Clifford on February 02, 2019, 05:55:58 PM
Do you have the original for 0005?

unfortunately, no.

Best regards,
Lisa Tedeschi

Alan Clifford · February 02, 2019, 06:08:29 PM

0005 was edited with an earlier version

Code Select

[XMP]           History Software Agent          : Adobe Photoshop Camera Raw 11.0, Adobe Photoshop Camera Raw 9.7 (Windows)

and it has a strange copyright injected into it

Code Select

[XMP] Rights : Copyright 2002

so its a shame you haven't the orginal.

Maybe Phil will be able to extract the maker notes when he comes back from holiday.

LisaTedeschi · February 02, 2019, 06:17:21 PM

Dear Alan,

Quote from: Alan Clifford on February 02, 2019, 06:08:29 PM
so its a shame you haven't the orginal.

Maybe Phil will be able to extract the maker notes when he comes back from holiday.

I definitely agree. Thanks!
Best regards,
Lisa Tedeschi

Phil Harvey · February 19, 2019, 10:08:04 AM

Hi Lisa,

I've taken a look at the images you posted:

IMG_0001.JPG - The makernotes are 3 unknown bytes. It is possible that the temperature is here, but I doubt it.

IMG_0002.JPG - ExifTool extracts the Reconyx AmbientTemperature

IMG_0003.JPG - The temperature is found in the Comment tag

IMG_0004.JPG - The file contains a large unknown trailer, but I can see no temperature metadata.

IMG_0005.JPG - The unrecognized makernotes contain no useful information. I can see no temperature metadata.

IMG_0006.JPG - The makernotes are 14 bytes of unknown data. This could possibly contain temperature metadata, but without more samples at known temperatures I can't say for sure.

IMG_0007.JPG - ExifTool extracts the Reconyx AmbientTemperature

IMG_0008.JPG - ExifTool extracts the Reconyx AmbientTemperature

- Phil

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Temperature metadata