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
6k 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=...
61
votes
15answers
115k 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 ...
111
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 ...
47
votes
11answers
68k 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. ...
23
votes
5answers
24k 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 (...
41
votes
10answers
20k 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 ...
11
votes
3answers
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?
14
votes
6answers
5k 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... ...
8
votes
1answer
4k 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.
10
votes
7answers
15k 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 ...
11
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
4k 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? [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 ...
40
votes
8answers
17k 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×...
13
votes
7answers
4k 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 ...
17
votes
4answers
46k 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 ...
23
votes
7answers
99k 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-...
3
votes
3answers
10k 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?
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.
8
votes
3answers
15k 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 ...
5
votes
7answers
56k 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
3k 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?
1
vote
1answer
424 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 ...
21
votes
17answers
31k 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 ...
18
votes
4answers
16k 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 ...
30
votes
5answers
9k 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?
8
votes
4answers
5k 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-...
21
votes
8answers
5k 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 ...
12
votes
4answers
821 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 ...
19
votes
3answers
4k 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
7answers
26k 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 --------------------+-------------...
14
votes
1answer
22k 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?
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 ...
4
votes
3answers
74k views

Any tool that would retrieve the ORIGINAL date a photo was created on even after it has been processed?

As mentioned in the title, sometimes the desktop or mobile application used to process/edit a photo, especially if it has been moved, copied, re-saved, etc.. would cause the very original date of the ...
3
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 ...
11
votes
3answers
9k views

Why don't Exif tags contain time zone information?

There's no zone information in the capture timestamp. Why?
11
votes
1answer
4k 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
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
2answers
17k 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 ...
7
votes
5answers
6k 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 ...
6
votes
2answers
691 views

Software for editing EXIF data

Can someone please recommend software that enables editing for exposure mode EXIF data? I have tried with Picasa, but it doesn't support editing of this specific property.
6
votes
1answer
506 views

Is there a software that make it possible to edit all exif values and add new paramerers?

A while ago I had the need to add cutom fields to my exif (some programming staff) I found out that most of the fields are locked and that I cannot add new fields Do you know a software that can 1. ...
5
votes
2answers
3k views

Software to cross-check EXIF date taken vs date in filename?

I have a library of about 25,000 photos (JPGs). I have been maintaining the library so that the date taken in the EXIF data reflects the actual capture date, but I keep finding exceptions where I've ...
3
votes
5answers
2k views

Is there a way to figure out a lamp's color temperature from a photo?

Let's say we have some incandescent, flourescent, luminescent lamps and LEDs, and there are photos made with different cameras in auto mode with each of these lamps on, and with a white sheet of ...
3
votes
2answers
2k views

How can I copy images to my camera for viewing?

I'd like to copy an image from the web to my camera (Canon S95) and view it on my camera's screen, sort of a poor man's iPad. I tried renaming the file but the camera reports "Incompatible JPEG". ...
2
votes
3answers
507 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
5answers
801 views

How does PPI relate to DPI in photo metadata?

I have been asked to provide pictures in JPEG format at a resolution of 300DPI. My computer give me a picture sizes in kilobytes and Photoscape the photo editing package that I use, converts ...
6
votes
3answers
10k 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 (...
13
votes
4answers
38k 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 ...
15
votes
5answers
18k 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 ...