Managing Location (EXIF) Data In Pictures

Q: What exactly is EXIF data on my digital pictures and can it really tell people where I am? — Judy

A: EXIF data (Exchangeable Image File format) is a type of ‘metadata’ that is imbedded in photographs that records a number of details.

There should be an image here!Metadata is essentially data about the data (how confusing is this getting?) that is common to many digital file formats including most of the documents that you generate.

In the case of photographic images, the EXIF data can contain any or all of the following:

  • Date and time the picture was taken and any subsequent edits.
  • Camera settings such as make, model, ISO speed, aperture, shutter speed, focus length, and whether flash was used.
  • Any software that was used to edit or touch up the photo.
  • General description of size, resolution, and copyright info.
  • Longitude and latitude (but only on cameras that have a GPS included, such as smartphones and some specialized digital cameras).

The list of potential data that can be mined from photographs is actually too long for this column, but some recent stories have created some fear of this extra information.

EXIF data is not some evil plot to undermine mankind; it was created over a decade ago as a way for really valuable information about a photograph to be captured (Jeffrey’s EXIF Viewer is an easy to use online EXIF viewer).

For instance, a photographer can compare various settings on images that they like or don’t like to improve their photos in the future or an amateur photographer can study what settings a pro is using to create some of the magnificent imagery that is on the Internet.

The location issue (or geotagging as it’s often called) came into play when smartphones that were equipped with both a GPS and a camera became popular. Depending upon your smartphone, the location data may be automatically captured on your photographs and available to anyone that knows how to view the EXIF information.

While this could be of concern in some obvious situations, not all pictures taken by a smartphone and posted on the Internet contain all of this information.

Facebook, for instance, removes any of the user generated EXIF data when you upload images so your location info (if it exists) is automatically stripped from the image that the public can access (the original file that Facebook has on its internal servers, however, will still contain all of the original EXIF info).

Flickr (and most photo-sharing sites) also strips out EXIF data for any picture that it resizes and only allows EXIF data to be retained on originals for those with paid accounts, which means you have to pay and purposely want that info on the network (professional photographers want this ability for copyright purposes).

If you take a picture with your GPS enabled smartphone and email the picture from your phone to others, than the location information will generally be included.

The easiest way to eliminate location information from your smartphone photographs is to turn off the location services while you are taking the picture (airplane mode will do it).

On some smartphones, you can specifically turn off location services for all photographs, but have it remain in use for everything else. iPhone users (must have the current IOS 4.x OS) can go into the Settings / General / Location Services to turn it off for the camera app.

Android users can turn off location info by going to the ‘Camera App’ menu and making sure the ‘Store Location’ option is turned off.

BlackBerry users can go into picture taking mode, press the menu button and choose ‘Options’ and set ‘Geotagging’ to disabled.

Frankly, I’m personally not too concerned about much of anything that I take a picture of and share with others; I like the fact that I’ll be able to go back to old pictures years from now and pinpoint where I was when I took them. (To each his own!)

Ken Colburn
Data Doctors Computer Services
Data Doctors Data Recovery Labs
Data Doctors Franchise Systems, Inc.
Weekly video tech contributor to CNN.com
Host of the award-winning “Computer Corner” radio show

Microsoft Finds Home For Its Colored Barcode Technology

Thanks to a deal with ISAN International, Microsoft’s colorful barcode technology — that was shelved two years ago — will begin appearing on DVD and video game cases later this year. ISAN, a Geneva-based company, assigns codes to movies, keeping a database of not only the movie but also of the director, cast members, and release date. The new barcode with its red, green, yellow, and black triangles is expected to simplify its procedures.

Once the new technology is activated, studios and producers will be able to link their personal Web sites to this database. In the future, consumers using digital cameras may even be able to scan the barcodes from DVD cases, advertisements, or billboards to a Web page to watch trailers or buy products.

In the initial trial stages, only Webcams and digital cameras will be able to take advantage of this technology, as cell phone imagery isn’t clear enough for the technology to read accurately. Another obstacle for this technology to hurdle is censoring what producers or TV networks don’t want the public to be able to view while allowing access to other portions of the material. According to Gavin Jancke, Microsoft researcher who invented the new barcode, the United States will eventually catch up with Japan where people are often seen taking photos of a billboard’s giant barcode. He also adds that while previous attempts to introduce similar technology has failed the rise in cell phone camera use and the current familiarity with the Internet may prove that this technology’s time has come.

[tags] Microsoft, Barcode technology, Gavin Jancke, colored barcodes, ISAN, web cams, digital cameras, new technology released[/tags]

Bubblesnaps

It seems like most of us have digital cameras these days, and many camera models are so compact that you can easily carry them around with you wherever you go. This has allowed us to take snapshots of just about anything that we may run into in our travels. Therefore, we have a lot of photos on our hard drives, and sometimes these photos may need a little bit of extra help in expressing themselves. A picture may be worth a thousand words, but if it’s not saying any of them, then the message really isn’t getting across. To encourage your photos to do the talking, use Bubblesnaps.

Can you imagine if a comic strip that usually featured dialog didn’t contain any thought or speech bubbles? Without them, you’d just see pictures, and you wouldn’t really know what was going on. Likewise, without captions, some of your digital pictures may be suffering. Bubblesnaps allows you to easily add speech and thought bubbles to your uploaded photos, and as you would imagine, you can customize the size and position of these additions. The bubbles will play out in the order that you added them, and you can then send your creation out to your friends and post it on your Web site. In this case, we really are in a bubble, after all.

[tags]Bubblesnaps, Digital Cameras, Snapshots, Pictures, Comic Strip, Dialog, Speech Bubbles, Thought Bubbles[/tags]