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.

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22
votes
6answers
4k views

Does the dpi number reported by camera in JPG have any meaning?

I have two cameras, a 6mpix Panasonic FZ8, and 14mpix Canon A2200. When I compare shots from two cameras, one of differences I notice is dpi number that camera reports in JPG info: FZ8 reports dpi=...
110
votes
18answers
8k views

How can I better organise and file my photos?

At present I meticulously add metadata as EXIF tags to my photos using Microsoft Pro Photo Tools, which also lets me place them accurately on a map. The thing is I tend to leave photos in a folder ...
39
votes
10answers
80k views

Is there a free program to (batch) change photo file's date to match EXIF?

I want to specify a directory and have the software find all the photos in the directory and its sub-directories, and if they contain EXIF date/time, it sets their filesystem timestamp to match the ...
42
votes
11answers
55k views

How to shift EXIF date/time created by time in days, hours, minutes?

I have two camera bodies, I was shooting while on vacation, when I downloaded the photos to lightroom, one body was set to the correct date/time, the other was off by 722 days, 4 hours, 32 minutes. ...
40
votes
9answers
17k views

What software can show my most frequently used focal length?

Many people recommend a focal length of 35mm, 50mm, and sometimes even 85mm and upwards for those interested in purchasing a prime lens. I, however, would like to figure out what focal length(s) I use ...
20
votes
5answers
20k views

Is there any software which will set the EXIF Dates based on the file's modification date?

I have been using Exifer for many years to re-date and re-name my photos based on the EXIF dates from the camera(s). I have now started using some alternative camera apps available on the iPhone (...
12
votes
5answers
4k views

What tool can visualize metadata from many photos on a Mac?

I have seen/heard about a PC/Unix (??) utility that goes through all your JPG/RAW pictures on your disk and shows you on a graph your most used lens, your most used zoom range, flash settings etc... ...
11
votes
4answers
9k views

Adding data to an EXIF file

What is the easiest way to add data to an EXIF file? For example if I wanted to add a copyright to my images can that be easily added to the EXIF data?
29
votes
5answers
7k views

Is there an EXIF standard for tagging people in photographs?

There are a number of websites that let you tag people in photos, such as Facebook and now flickr, but is there an EXIF standard for tagging who is in a photo, and where they are?
7
votes
1answer
3k views

How can the aperture value written in Exif be larger than the nominal limit of the lens?

A photo shot with an 1:1.8 lens contains the following exif data: ApertureValue: 1695994/1000000 MaxApertureValue: 16/10 How is this possible? Both values are <1.8.
8
votes
2answers
10k views

How to add EXIF Lens data in Lightroom for unknown lens?

One of my prime lenses is non-electronic and so the photos EXIF data does not include any lens information. These show up in Lightroom 4.3 as "Unknown". I see no way through Lightroom to add this ...
1
vote
2answers
3k views

How can I get barcode-scan information into my photo metadata, onsite, untethered?

I need a DSLR camera with a barcode scanner for on-site tours photography, which means it needs to be untethered! The image would have to contain the barcode scanned information in the image metadata ...
30
votes
4answers
6k views

What tagging system do you use?

What tagging system do you use for your photo collection? I ask because tagging is the only way I can make sense of my large photo collection and I am trying to improve the effectiveness of my photo ...
37
votes
8answers
14k views

If an image is rotated losslessly, why does the file size change?

I was searching for methods of lossless image rotation and happened upon this question which explains it rather nicely: Are "Windows Photo Viewer" rotations lossless? So I created a 256×...
12
votes
7answers
3k views

What useful things can/can't you find out from exif tags?

I'm aware that you can find out a lot from looking at the exif tags of an image, such as camera make/model and the various settings used to take the picture, but what non-obvious things can you ...
9
votes
6answers
12k views

What tools exist to remove metadata from photos?

Whenever I share my photographs, I also share lots of information that I do not want to pass on: specific camera model that the photo was taken with exposure time focal ratio ... How can I remove ...
23
votes
7answers
90k views

How can I get the shutter actuation count for Canon EOS 500D/550D?

How can I get the actual shutter actuation count for a Canon EOS 500D or 550D (Digital Rebel T1i or T2i)? Two popular solutions for most earlier Canon cameras don't work: I peeked at location 0x9d-...
8
votes
5answers
3k views

Why employ the xmp sidecar file in Lightroom?

Currently I trust the catalog file to hold all of develop settings for my files. I don't use xmp/sidecar files. If you use them, why? I'm searching for a reason why I should use them.
2
votes
2answers
2k views

How to extract depth information from JPEG files?

Some mobile phones support changing the depth of field using depth information calculated from dual cameras. If the depth information is stored in the jpg file, how can it be extracted?
5
votes
7answers
39k views

How can I see the photo settings like f-stop, ISO etc. of a image?

I am new to photography and enjoying shooting with my Nikon D3200 camera. Once I take a photo, is there any tool by Nikon or a third party which can give me info like F-stop, ISO, Shutter speed, etc? ...
1
vote
1answer
396 views

DPI in photos vs DPI in Printers/Scanners [duplicate]

When I look at the properties of a JPEG shot on my Canon 5D MkIII (set to the highest quality settings on the camera), i've noticed that the 'Horizontal/Vertical Resolution is 72 DPI' My only ...
18
votes
4answers
15k views

How can you write/convert Picasa's People tags to the EXIF data?

I use Lightroom for my workflow, and I tag photos with people's names so that I can find them faster. Since Lightroom doesn't have the "Faces" feature, I want to use Picasa's People feature for this ...
19
votes
15answers
25k views

How can I create a map with GPS data from EXIF?

I've been taking photos all over the country last year and now I want to create a map with all the places I've been. Luckily all my photos are geotagged which makes the whole process easier. The main ...
15
votes
4answers
28k views

How to detect if a photo's metadata has been changed?

There was a photography contest and it was limited to only three days of shooting - but the winning photo seemed a little out of season. So I suspect that the winner changed the metadata on the ...
11
votes
4answers
609 views

Is it safe from a privacy and security point of view to display identifiable EXIF data on a public web site?

Whenever I compare the exif data displayed by Flickr or the data on Lightroom (3.4), I can't avoid getting my mind blown for the simple fact that I never come to a software tool (for windows) with a ...
15
votes
2answers
3k views

Is there any hope for Exif TimeZoneOffset as a standard?

The TimeZoneOffset Exif tag was proposed as an ISO photography standard several years ago but never made it into the EXIF standard or MWG guidelines. I can write data to this tag using exiftool and ...
6
votes
2answers
2k views

What is the correct, standard EXIF metadata to add for Rokinon 8mm fisheye lenses?

I own a Rokinon 8mm Ultra Wide Angle f/3.5 Fisheye Lens for Canon EF Mount. This is a manual lens not electrically connect to the Canon 60D body I use it with. With exiftool I want to add the correct ...
6
votes
7answers
21k views

How to find lens information from image metadata?

Is there a way to find out using which lens an image was taken, especially in Ubuntu? I tried using exif utility which gives me following o/p: $ exif 20111030.JPG --------------------+-------------...
11
votes
1answer
2k views

When exactly is “GPSTimeStamp”?

I'm trying to use EXIF data from my photos, and I discovered the wonders of the tag "EXIF GPS GPSTimeStamp" (a timezone-independent timestamp). However, I notice that it's often different from "EXIF ...
2
votes
3answers
5k views

Is there software on Macintosh for adding GPS data to RAW files?

I want to add GPS location to RAW photos (from my EOS7D) using location data from my iPhone 5. Aperture doesn't save the data I added unless I export the RAW files as JPEGs. I've searched the site ...
10
votes
1answer
5k views

How does Photoshop/Lightroom get the Colour temperature of a Raw image?

I captured a Raw image using my Canon 450D. When imported this RAW(CR2) file into Lightroom and Photoshop CS5, it showed the Temperature as 4900 and White Balance setting - "As shot". When I checked ...
8
votes
5answers
5k views

How can I tell if two pictures were taken with the same camera without metadata?

Is it possible to identify images (without exif data) and link them to the exact same camera? If so, I'd like some software recommendations to get the job done. I have two photos that I'd like to ...
8
votes
3answers
12k views

Can I determine if an image was captured using Manual or Auto mode?

Is there a way to find out if a picture (once taken) was taken in Manual vs. Auto mode? My daughter is in a photography class and we both have taken images with the same camera. I sometimes put it ...
8
votes
2answers
15k views

How can I force Lightroom to export metadata for all photos?

I created a temporary catalog for several shoots, but forgot to enable the (IMHO most important and should be enabled by default *shakefist*) check-box in Catalog Settings: Automatically Write Changes ...
1
vote
3answers
370 views

Lightroom 6 - finding multiple faces with metadata filtering

Is there a way to perform metadata filtering in Lightroom (version 6) that allows finding images that contain multiple faces? For example, I would like to see image where BOTH of my kids are in them (...
1
vote
1answer
2k views

How to use exiftool to write date tags according to file path?

I need to set the exif date tag of a bunch of photos stored with the following hierarchy: YEAR/MONTH/DAY/IMG_something.JPG How could I do it easily with exiftool?
4
votes
2answers
8k views

Search large collection of images for exif tags without lightroom/aperture etc

Is there a way, possibly using exiftool, to quickly search an entire directory or disk of images for a certain exif/XMP/IPTC tag and maybe even give a summary of what the collection contains (...
9
votes
3answers
24k views

How to find the color profile/space used by a photo?

Some of my photos look different because I was not careful with saving with or without color profile. Now I would like to be able to find out what color profile is used by an image. Is there a simple ...
17
votes
6answers
4k views

Can digital cameras sign images to prove authenticity?

Beyond the metadata/EXIF/IPTC (which can be easily altered), is it possible to prove that an image is authentic? If this is not possible, how does a photojournalist prove the authenticity of an ...
7
votes
4answers
3k views

How can I incrementally date photos?

I have a collection of photos that have no date information. They have no Exif data, and the file modification dates are all identical. The only sequence is in the file name: image-0001.jpg, image-...
7
votes
3answers
5k views

What's a good batch-mode EXIF data editor?

I'm currently scanning a lot of old slides. The scanner I use has this annoying habit of adding "My beautiul picture" in a description field in the EXIF format. I'd like to use an EXIF editor to get ...
7
votes
2answers
8k views

Is “Date Taken” Exif data possible on .PNG file, and is it possible to copy “Date Modified” to “Date Taken”?

I want to change the Exif data for some .PNG files so that they have the "Date Taken" tag. Is it possible to use that tag on .PNG files? Is it possible to copy the "Date Modified" date to the "Date ...
21
votes
3answers
13k views

Is there a film scanner that can read the data from APS films and include it in the EXIF metadata?

I've a bunch of APS films that I'd like to scan but all the film scanners I've seen on the market today are 35mm scanners; and whilst some have little carriers to allow you to physically scan APS, ...
6
votes
2answers
18k views

How to remove 'Program Name: Adobe Photoshop' from the metadata?

I've tried all the solutions from here as well as from stackoverflow, the tool mentioned (ExifTool) won't remove the metadata. I'd like to remove all the Photoshop information from my jpeg, leaving ...
21
votes
2answers
5k views

Google Photos high quality backup — how does Google achieve great compression and am I losing some data?

I'm sure that many of us have used Google photos high quality backup which allows us to store photos online without fees. Recently, I thought of testing just how high quality the uploads really were ...
19
votes
6answers
15k views

Ways to edit metadata of a PNG file?

How can I edit metadata of a PNG file? Is there some free software I can use?
14
votes
1answer
20k views

Are there GIMP plugins that allow one to view and edit EXIF data?

Does anyone know if there is a plugin available for the GIMP that will let you view and edit all the EXIF information associated with an image?
5
votes
1answer
1k views

What do these six lenses in EXIF mean, for the iPhone 7 Plus?

The iPhone 7 Plus has two back cameras, but the lens field in EXIF has six different values: iPhone 7 Plus back camera 3.99mm f/1.8 iPhone 7 Plus back camera 6.6mm f/2.8 iPhone 7 Plus back ...
5
votes
1answer
366 views

What metadata can I safely delete without affecting the appearance of an image?

I would like to remove as much metadata as possible from an image without changing its appearance. I have used exiftool -all= image.jpg and it works well most of the time, but quite often the colors ...
4
votes
1answer
2k views

Updating metadata in Darktable

Bear with me. I've been using Darktable for a while now along with Olympus' own software and digikam for uploading, keywording etc and GIMP for any retouching I can't easily achieve in Darktable. I ...