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-   -   Loss of Exif (https://e-group.uk.net/forum/showthread.php?t=51250)

MJ224 17th August 2019 10:23 AM

Loss of Exif
 
Can you retain exif after Photoshop stacking....???:confused:

peak4 17th August 2019 11:35 AM

Re: Loss of Exif
 
Quote:

Originally Posted by MJ224 (Post 488113)
Can you retain exif after Photoshop stacking....???:confused:

Personally I wouldn't know, never having used Photoshop, however I would have thought a possibility would be to use Phil Harvey's EXIFTOOL to cope the exif data from one file in the pre-stack and paste/write it into the final stacked photo.

Off out to prune some bushes now, so don't have time to look up the syntax myself, but it's a very powerful program.

Also look up Exiftool GUI in your favourite search engine, for a more accessible interface.

MJ224 17th August 2019 11:46 AM

Re: Loss of Exif
 
Tell us more about the prune bushes....*chr

Thanks for info, I will look into it. I am surprised that Photoshop does not pass on the Exif data, despite stacking..., but there you go.....*chr

wornish 17th August 2019 11:48 AM

Re: Loss of Exif
 
Quote:

Originally Posted by MJ224 (Post 488113)
Can you retain exif after Photoshop stacking....???:confused:

Unfortunately, I think you do lose most of it. In fact, in Photoshop if you select File > File Info it will show you what's left.

MJ224 17th August 2019 12:18 PM

Re: Loss of Exif
 
https://live.staticflickr.com/65535/...99392930_z.jpg

Agapantha with exif


by Mark Johnson, on Flickr

Now this has retained Exif, by stacking with CombineZ-P......It has stacked pretty well as well...:-)

wornish 17th August 2019 02:46 PM

Re: Loss of Exif
 
Quote:

Originally Posted by MJ224 (Post 488123)

by Mark Johnson, on Flickr

Now this has retained Exif, by stacking with CombineZ-P......It has stacked pretty well as well...:-)

Lovely colours and very nice dof. As you say stacked with CombineZP it keeps the Exif info. Will remember that for future use.

blu-by-u 19th August 2019 08:19 AM

Re: Loss of Exif
 
The EXIF is retained in Affinity Photo BUT only the EXIF of the 1st photo

A stack of 10 images to produce this "smooth" flow. The EXIF shows /2.8, 1/160s & ISO 200

https://live.staticflickr.com/1820/2...d957c58c_c.jpg

Harold Gough 15th October 2019 08:08 PM

Re: Loss of Exif
 
Quote:

Originally Posted by MJ224 (Post 488113)
Can you retain exif after Photoshop stacking....???:confused:

Maybe it will be there but inaccessible. I can't access EXIF data, although it gives a date, in stereo pairs.

Harold

Harold Gough 15th October 2019 08:11 PM

Re: Loss of Exif
 
Quote:

Originally Posted by wornish (Post 488120)
Unfortunately, I think you do lose most of it. In fact, in Photoshop if you select File > File Info it will show you what's left.

I read mine in FastStone Viewer.

Harold

Angelica 16th October 2019 07:25 AM

Re: Loss of Exif
 
Quote:

Originally Posted by blu-by-u (Post 488262)
...
A stack of 10 images to produce this "smooth" flow. The EXIF shows /2.8, 1/160s & ISO 200

I never tried stacking and not sure I understand what it's about but your results inspire me to find out more.

MikeOxon 16th October 2019 08:52 AM

Re: Loss of Exif
 
Usually, one stacks photos in order to change something throughout the stack, so the photo data will not be the same for each individual shot. It seems that Photoshop always 'loses' some EXIF data, even on a single shot. Try comparing the results from the EXIF Tool before and after Photoshop. I find, for example, that focus distance information is removed.

OM USer 16th October 2019 10:23 AM

Re: Loss of Exif
 
If one opened up the first image in a new Photoshop session and then just copied in the stacked image over the top as a second layer then will all the EXIF from the first image (background/base layer) be retained when you save as JPEG??

Petrochemist 16th October 2019 04:08 PM

Re: Loss of Exif
 
Quote:

Originally Posted by MikeOxon (Post 492369)
Usually, one stacks photos in order to change something throughout the stack, so the photo data will not be the same for each individual shot. It seems that Photoshop always 'loses' some EXIF data, even on a single shot. Try comparing the results from the EXIF Tool before and after Photoshop. I find, for example, that focus distance information is removed.

At least one value will change every time you do a stack.


Focus distance or focal length will change for focus stacking.
Aperture/effective ISO/shutter speed will change for HDR type stacking.
Most of the time the time/date stamp will change (doing HDR for a single raw file is the only exception I know) this covers panoramas, astro type noise stacking & pseudo ND stacking...


Unfortunately I've found most stacking software will remove far more EXIF than just the values that are changing. Copying the data back form one of the original files is the best method I've found to get it roughly right, perhaps followed by manual editing to alter the values changed by the stacking operation.

blu-by-u 17th October 2019 05:32 AM

Re: Loss of Exif
 
Quote:

Originally Posted by Angelica (Post 492362)
I never tried stacking and not sure I understand what it's about but your results inspire me to find out more.

I was experimenting into stacking as an alternative to using an ND or some light cutting filter to get that smooth silky waterfall look.

As it was a bright day, harsh light and all, and bummer me, did not bring any ND or CPL with me, But I did bring my tripod. so set, frame and shot off 10 images.

What I noticed was the leaves are more visible instead of blurred from long exposure. The water was not that smooth as with long exposure but white enough for the flowing effect.

It seems that this could also be done with the Super High Resolution mode. But unfortunately I did not try that then.


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