Questions tagged [metadata]

Metadata is additional data related to a photo, this is usually written by the camera into the image file at the time of shooting but can be edited later. This metadata includes information such as the time and date of shooting, equipment involved and settings used.

Filter by
Sorted by
Tagged with
0 votes
2 answers
72 views

How can put 2 jpg images side by side in a new jpg without losing metadata or image quality?

I have lots of photos with writing on the back. I've scanned the fronts and backs into jpgs, and now I want to create a single jpg for each front/back pair. The front and back images should go side by ...
1 vote
2 answers
53 views

Why does Jhead with the -autorot option fail to fix my photos' orientation?

I have a lot of photos taken with an iPhone SE that are not displayed in the correct orientation when I view them using the Windows Photos app, XnView MP, or FastStone Image Viewer. I never modified ...
0 votes
0 answers
25 views

Are there software tools to help analyze EXIF metadata to help guide new lens choices? [duplicate]

I have a zoom lens (18-135mm on an APS-C body) and I am starting to look at options to upgrade to a different lens. I bought my camera and lens together and while I used a different lens (70-350mm) ...
  • 113
0 votes
0 answers
38 views

How to group pictures based on various degrees of image similarity, for the purpose of fixing the pictures that contain incorrect or No metadata

Preface: ( 3 Actions that led to the problem) I upgrade iPhones every other year and foolishly enabled “delete after backup” from both Amazon and Google photos. In some cases; both at the same time, ...
1 vote
0 answers
61 views

Where does Digikam store meta data for video files? [closed]

I use Digikam for photo and video management. It's set up to store metadata including tags, titles, and ratings in the files themselves. With photos, this works as expected. If I review the meta data ...
1 vote
1 answer
70 views

Is there an exif tag for face areas?

There is a SubjectArea tag in EXIF. Is there something equivalent for Faces? https://www.cipa.jp/std/documents/e/DC-008-2012_E.pdf https://www.cipa.jp/std/documents/e/DC-X008-Translation-2019-E.pdf ...
  • 111
0 votes
0 answers
130 views

How can I change the "time taken" metadata for iPhone HEIC files?

I have some recent iPhone photos with timestamps in the wrong timezone. In Windows PowerShell, exiftool -s -a -G1 *.heic | select-string 'date|heic' | select-string -notmatch file produces this for ...
1 vote
4 answers
113 views

Can I assume the DateTimeOriginal of an image without an OffsetTimeOriginal is already in UTC?

I'm working on an application which will extract some EXIF information from images including when the image was taken. I see that some images provide a DateTimeOriginal but not an OffsetTimeOriginal. ...
1 vote
2 answers
78 views

Time zone camera clock was set for does not match GPS timezone

I have a bunch of photos I took with my DSLR. It does not have GPS, so I geo-tagged all the photos using GPS positions I captured on my phone. This part works fine. However, when I upload them to ...
  • 771
2 votes
3 answers
142 views

Programatic way of aggregating focal length metadata across large collection of photos

I am looking to analyze my library of photos to see what focal lengths I use most often, to better inform lens purchasing decisions. The recommendations I have been able to find online so far usually ...
1 vote
3 answers
229 views

Suspect photograph timestamp data has been altered

I received photographs over email from a client which I suspect were taken in 2022 but the client insists are from 2021. I looked at the metadata, filenames, and date modified timestamps to look for ...
  • 111
3 votes
0 answers
142 views

How do these modern multi-lens/multi-sensor smartphones work?

My last smartphone just had one front lens, so I could understand. My current phone has three front lenses (and three sensors, too, I guess), so I was a bit surprised, that I had zero control over the ...
  • 399
0 votes
1 answer
20 views

How to update XMP metadata in paired JPGs in Lightroom?

Background: In my catalog, many photos that were imported as RAW+JPG. Note that I obscure JPGs in Library View (the default) to simplify my workflow. In order to export my Lightroom keywords, I have ...
  • 113
0 votes
2 answers
76 views

Incorrect exif orientation on Canon 80D/60D when upside down/180 degrees?

The EXIF orientation tag can hold 8 values for the orientation of the camera. One of the tag values 3, indicating that the camera was turned 180 degrees, i.e. held upside down. However when I take a ...
  • 101
0 votes
2 answers
73 views

What's the best software for reading and writing image tags to and from image meta data fields?

I have millions of images that have had image tags assigned to them by various cv-api's my plan is to generate a data file, that will associate the image file names with the data captured so that I ...
2 votes
2 answers
247 views

Migrating away from Picasa - "Write faces to XMP" changes the hashes of images

I want to migrate from Picasa (to digiKam) and to export the face tags. I tried the experimental feature of writing faces to XMP, and noticed it changes the SHA256 hashes of the files, which I want to ...
  • 21
0 votes
0 answers
37 views

Lightroom: read metadata of files based on a list containing full-paths-filenames

Is there a way in Lightroom to force update (read) metadata of image-files according to a list consisting of full-paths/filenames only? That list contains the full paths to the files to be updated, ...
  • 151
0 votes
1 answer
90 views

What is the term write time referring to?

Date time taken, and date time digitized are the same. Write time is one hour prior. What does that mean? Photo was analyzed on opanda.
  • 21
0 votes
2 answers
161 views

Is there any photography website where I could find photos based on exposure time, focal length, ISO...?

I was wondering if there is a site where I could filter photos that were shot, for example, with a certain exposure time and few other conditions. Is there any photography website where I could filter ...
6 votes
0 answers
1k views

Where are Samsung's "Gallery" app's automatic "tags" stored and how can they be used downstream (i.e. in non-Android photo mgmt / dam software)?

Samsung's "Gallery" does a fantastic job at automatically / on its own assigning "tags" to photos, making it easy to find photos with certain keywords (e.g. "sunset" or &...
1 vote
2 answers
134 views

Copy DNG/XMP metadata

Years ago I scanned about 1000 negative photos. Now I have purchased a new negative scanner and rescanned all of my negatives. Is there any way to copy metadata from the old DNG/XMP files to the new ...
0 votes
4 answers
221 views

How can I automatically add location from GPS log on my smartphone to SLR taken images?

What software is best for adding gps data to photos from gps log i run on my android device? I want to do as little manual labor as possible preferrably software does it all for me. Look at photo ...
  • 195
0 votes
1 answer
64 views

Which tag to set in exiftool (for videos) in order to keep timestamps persistant for display on a (Android) mobile device? [closed]

I recently backed up pictures and videos from my Android mobile phone using GoodSync in order to keep the correct timestamps in Windows. However, I realised that a large amount of files didn't have ...
0 votes
1 answer
70 views

Preserving Recovered Images: What is stored in the "UserComment" EXIF tag?

Background Hello, I was able to recover some images from a broken hard drive. Some of the images seem to have some binary data in the UserComment tag and I was wondering if it could be Lat/Long data? ...
1 vote
1 answer
144 views

What metadata fields are shown in the MacOS Preview Inspector TIFF tab?

If I view a jpg in the MacOS Preview app, I can use Tools>Show Inspector to bring up a More Info window. Its info tab (ⓘ) has four sub-tabs: General, Exif, IPTC, and TIFF. The General tab shows ...
0 votes
1 answer
285 views

How to calculate object position (lat, long) given exif GPS location of camera phone?

Probably this question was asked, but I couldn't find solution to my problem. I have an image with exif GPS location (which is position of the camera) as well as elevation above sea level. How can I ...
  • 1
1 vote
1 answer
189 views

raw files don't contain EXIF but their JPEG do (Fujifilm X100S)

for many years I shoot with my Fujifilm X100S in both RAW+JPEG format. I just noticed that the RAW files don't contain any EXIF data, but their JPEG counterparties. (Don't know why, I should check the ...
0 votes
1 answer
616 views

set EXIF date from filename (uncommon formats)

I have a bunch of old photos that uses weird naming convention..like: dd-mm-yy_HHMM yyyy-mm-dd HH.MM.SS yyyymmdd_HHMMSS and no "Date taken" field on the EXIF infos. Also, creation date is ...
3 votes
3 answers
85 views

How should I store "description" metadata for maximum consistency, visibility, and portability?

I’m embarking on a project to scan our family’s old collection of slides. My plan had been to write descriptive information about each slide (e.g., when/where/why it was taken, who's in it, etc.) to ...
1 vote
0 answers
41 views

LG phone camera. How to interpret this EXIF User Comment metadata? "0 FM0 CR0 Prmid2 mxDrkA..."

What do the following numbers and abbreviations mean? Photos taken with LG phone cameras tend to have information like this in the "User Comment" metadata: 0 FM0 CR0 Prmid2 mxDrkA2.07 ...
2 votes
1 answer
949 views

How does google photos get timezone and can I change it?

I started using google photos awhile ago to archive my vacation photos. Sometimes I want to change the order of the photos and would simply rename them BUT I also found google photos actually displays ...
1 vote
1 answer
107 views

Copying all photos with EXIF Rating >= 4 using ExifTool

I have used EXIF's Rating interval for ranking photos in my collection. My photo collection is organized in directories in the form YYYY/YYYY-MM-DD Description/Filename.jpg, e.g. 2020/2020-12-31 New ...
  • 113
0 votes
2 answers
239 views

What is the best way to align several sets of photos metadata?

For reasons, I do not know or understand, our wedding photographers photos don't have the correct data in the EXIF data. I guess this could have been due to editing, I don't really know. They used ...
1 vote
2 answers
120 views

Should I fix an image orientation when creating a thumbnail?

I am a programmer, and I made an app for sharing images. I will not say the app's name because this is a genuine question, not a way to promote the app. People are starting to use my app, and I have ...
  • 203
1 vote
1 answer
385 views

In LightRoom Classic how can I filter all photos which are part of a stack, but not on top of a stack?

For use in other tools I want to write in Lightroom Classic to a photo's keywords if a photo is part of a stack, but not on top of a stack. For this the easiest would be to create filter which shows ...
  • 431
0 votes
1 answer
180 views

Jpg thumbnail showing larger than the original picture

I recently downloaded a picture from LinkedIn, and something really weird happens with it. Let me just state before that I can't show you the author asked me don't show it. So, if I do "read ...
  • 3
0 votes
1 answer
61 views

How to add "HDR" to EXIF in Lightroom Classic?

Is there a way to add the fact that an image was crated using HDR to a photo's EXIF data in Lightroom Classic?
  • 153
1 vote
0 answers
111 views

Change EXIF format in Lightroom Classic

I noticed Lightroom Classic outputs the Exposure Time in the EXIF data as 0.0025 instead of 1/400. Is there anyway I can change the format?
  • 153
1 vote
1 answer
385 views

Is there a way to know which camera captured images?

I am a medical researcher, doing research on some medical images. I have some JPEG images, and for a study, I need to include the information on the camera type used to capture those images. Is that ...
  • 173
1 vote
1 answer
155 views

Corrupted Date Taken

Some of my older images are showing Date Taken later than the actual date that the camera took the image. The EXIF data shows the correct Date Taken in the field APP12::PictureInfo\TimeDate\...
1 vote
2 answers
888 views

ExifTool does not extract corrupted EXIF metadata from jpeg file. How to repair it?

The image viewer nomacs offers a quick way to add image notes via Exif.Image.ImageDescription metadata. After having edited the form for my-image.jpg, I can see this property in nomacs and Thunar (...
  • 43
2 votes
3 answers
185 views

What's the best format for pictures in order to have the most metadata?

Working with a smartphone, I've seen that JPEG shows a lot of information in the EXIF, where PNG not as much. However JPEG does some compression on the image which I'd like to avoid if not necessary ...
0 votes
3 answers
178 views

How can I infer parameters such as distance from metadata?

Is it possible and how can I infer a parameter like the distance or the illumination from the chart, by looking at the metadata of the picture ? To give some context, I am working on a chart with ...
0 votes
3 answers
148 views

Cannot read GPS position from photo

I cannot get GPS position from this photo exiftool show: | 8) GPSInfo (SubDirectory) --> | - Tag 0x8825 (4 bytes, int32u[1]): | 007e: 00 00 15 fe ...
  • 23
17 votes
4 answers
5k views

How to check if a photo is edited (even basic edits like exposure and white balance)?

A competition I want to participate in demands that they want unedited photos. The submission should not even have basic edits like brightness, saturation, white balance etc They claim they'll check ...
  • 171
0 votes
2 answers
203 views

How do I Include IPTC metadata for rights usage terms in a JPEG exported from Lightroom?

I have a metadata preset I created in Lightroom which I use to import JPG files from my camera. In this preset, I provide a text value for the "Rights Usage Terms" attribute in the metadata. ...
0 votes
0 answers
26 views

How to delete all metadata from all JPEG files in folder using ImageMagick? [duplicate]

I have many JPEG files in folder D:\folder. I want to delete all metadata from all JPEG files in this folder. I used ImageMagick. I made: magick mogrify -strip "D:\folder\*" Am I right?
  • 85
1 vote
1 answer
136 views

Suggestions on how to create a printout for capturing metadata?

I'd like to print a collection of digital images in a way that would make it easy for someone to manually annotate metadata (people, locations and events). I've scanned a large number of old family ...
  • 173
7 votes
2 answers
788 views

Is there a standard convention for indicating precision in jpeg metadata timestamps?

Exif timestamps have a format of "YYYY:MM:DD HH:MM:SS", possibly with a timezone at the end. Is there a general convention for how to handle these timestamps when the known precision is less ...
3 votes
2 answers
706 views

Metadata: UserComment, ImageDescription, Description; what's their purpose?

$ exiftool test.jpeg | grep 'This is' Image Description : This is the 'ImageDescription'. User Comment : This is the 'UserComment'. Description : ...

1
2 3 4 5
11