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
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 ...
42
votes
11answers
56k 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
10answers
83k 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 ...
40
votes
9answers
18k 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 ...
37
votes
8answers
15k 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×...
30
votes
4answers
6k views

What tagging system do you use? [closed]

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 ...
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?
26
votes
3answers
5k views

What photo-sharing websites expose camera serial numbers?

What websites expose the camera body serial numbers from the original image EXIF? Flickr is a photo sharing website that exposes lots of photo metadata (from the EXIF data) and even make it easy to ...
24
votes
5answers
810 views

Should I geotag the location of the subject or the photographer?

If I take a photo of a distant object with a zoom lens, and then geotag it manually, would it be more useful to tag the location of the distant object (what is seen in the photo) or the location from ...
24
votes
7answers
91k 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-...
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=...
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 ...
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, ...
20
votes
5answers
21k 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 (...
20
votes
6answers
16k 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?
19
votes
14answers
4k views

What are ways to record who took the pictures if a camera is used by multiple people?

My wife and I both like to go out photographing. We usually have only one DSLR/MILC with us, so we take turns in taking pictures. (Rarely, if we have multiple cameras at hand, they usually have ...
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 ...
19
votes
7answers
11k views

How should one best manage large collections of photographs?

With gigabytes of pictures accumulating over time, I'm wondering what systems (software, strategies, etc.) people are using to keep track of their collections? Let's say you remember a picture and you ...
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 ...
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 ...
16
votes
6answers
5k views

Fix photo timestamps?

I took a bunch of pictures, and when I loaded them onto my PC, I discovered the time on my camera was set incorrectly. Now this normally wouldn't be a problem...but I am combining pictures from ...
16
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 ...
15
votes
4answers
30k 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 ...
14
votes
5answers
2k views

Batch adjusting the date (but not the time) of photos imported into Lightroom?

I purchased a new camera during my vacation, but I managed to take a whole night worth of photos with the incorrect date. I purchased the camera July 18th, but managed to set June 18th as the date. ...
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?
14
votes
4answers
2k views

What is the best practice for setting JPEG metadata for CC-BY-NC licensed pictures?

I want to publish my pictures with a CC-BY-NC license but I could not find a tutorial how store this information with my JPEG metadata. Is there a best practice? Do services like Flickr, Google+ or ...
13
votes
3answers
304 views

Do web-based photofinder services for stolen cameras work?

Unfortunately I've been robbed this week, and the thief stole my Nikon DSLR + Optics. I am considering registering in Stolen camera finder or CameraTrace, which browse the metadata of web pictures. ...
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 ...
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... ...
12
votes
3answers
1k views

Lightroom Upgrade vs Lens Metadata

Adobe Photoshop Lightroom 4 supports new lenses compared to earlier versions. I was hoping that it would change some of my lenses from 'Unknown Lens' to a specific model, but it did not. Synchronizing ...
11
votes
2answers
2k views

Does a crop sensor affect closest focusing distance? Why does it not affect focal length in EXIF data?

Since I am considering to buy the Nikkor 105mm micro VR, I wondered if the cropped sensor does affect the closest focusing distance of 0.31m? Thinking about this, the following additional (and ...
11
votes
5answers
680 views

What do you wish you knew about Lightroom keywords when you started?

Having been a very sporadic user of keywords, and not structuring them in any sort of manner, I am binning my current keywords and starting again. The areas I would like advice in are: Creating ...
11
votes
4answers
640 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 ...
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?
11
votes
2answers
2k views

How can I export EXIF metadata from Apple Aperture?

I'm trying to export the EXIF metadata from my photo archives so that I can do some analysis of which focal lengths I use the most. Aperture has a "File --> Export --> Metadata..." option, but that ...
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 ...
10
votes
4answers
912 views

Can information like a signature, secret key or password be encoded in a photo?

I want to protect copyright of my photographs. So, I've decided I'd like to put some signature like information in my photos. According to my research, - I have copyright as default and I don't ...
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 ...
10
votes
2answers
3k views

Which color space is used by my iPhone 8 photos?

While my old iPad mini photos say their color space is sRGB, my new iPhone 8 photos tell me their color space is "65535" ("unknown value"). Some sources say this value means "uncalibrated", but that ...
10
votes
1answer
8k views

How to change camera model with exiftool?

I bought a Nikon D600 only to realise that Lightroom 4 can't read the RAW format that it shoots in. I've done some research and found that some people use the Exiftool to change the model and then ...
10
votes
1answer
14k views

What is the “Image Unique ID” EXIF field?

What is the Image Unique ID in Exif info? what is it used for?! It seems each system could use its own method, so is it still unique between different systems? Searching online I was able to find ...
10
votes
3answers
8k views

How do I determine focus points in Adobe Lightroom?

Not sure if this is possible or not in Adobe Lightroom. I would like to see the focus points chosen by my Canon DSLR. I am guessing this is stored somewhere in the EXIF, but I'm not certain. I find ...
9
votes
2answers
5k views

How can I extract just the value of a tag without the name using exiftool?

I am trying to save camera make to a var in my bash script. If I use: exiftool -make x.jpg This returns: MAKE : SAMSUNG I need it to return just the value, without the key and colon. What am I ...
9
votes
6answers
13k 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 ...
9
votes
3answers
26k 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 ...
9
votes
6answers
4k views

Can I find out if two pictures were taken by the exact same device?

So, let's say I have two identical iPhones, both of them are the same model and are running the same iOS. I then proceed to have someone pull a random picture off of one of the phones without telling ...
9
votes
2answers
1k views

Rear or Front Facing Camera through EXIF Data?

I have compared the standard EXIF data from a picture taken with a mobile phone's rear camera and another taken with the same phone's front camera. The same fields appear in both files and no big ...
9
votes
1answer
291 views

Is the Canon 1D-X camera's slight angle of rotation stored in the metadata?

With a Canon 1D X, when I look through the view finder or look at the "Info" panel (having set up particular options), the camera knows if it is tilted slightly left or right and also knows if it is ...
8
votes
4answers
2k views

How can I rename files to match their EXIF “created date”?

I have around 3000 jpeg photos all with names like "DSC_0596". The metadata has the date the photo was created, which would be much more useful. Is there a way to extract the date from the metadata ...
8
votes
2answers
3k views

How to edit the shutter speed value in metadata?

I found ExifTool, which allows you to edit almost any piece of metadata from the command line. However if you try to edit the shutter speed (using exiftool file.tif -shutterspeed=1/200), it simply ...