Verifying digital photo authenticity with izitru

The popular photo manipulation software Photoshop celebrated its 25th birthday this week. Photoshop and other tools like it have made it incredibly easy to manipulate digital photos. That in turn makes it easier to create photographic hoaxes – including ghosts, cryptids, UFOs and other targets of skeptical investigations.

It is not surprising that photo hoaxes are quite common these days and are constantly passed around on social media. Thus skeptics need good tools for debunking them.

One such tool is izitru.

Two cases of “truther” nonsense undone by photo/video tech expertise

Photographer by Nicolás García, licensed CC-BY-SA-2.5

I noticed an interesting parallel between two cases involving different flavors of “truthers” in the last two weeks. Both involved observers applying some knowledge of digital photography technology to undo the nonsense being perpetrated by conspiracy theorists.  One involved a classic debunk of a claim involving video footage, the other involved some good old fashioned detective work set in motion by a clue in a digital photo file.

Both cases remind us that skeptics need to be aware of the ins and outs of technologies used (and misused) by those who would feed the misinformation to the general public. Awareness of these technologies can quickly lead to skeptical wins.

Read on for more…

See how to debunk viral photos in seconds using image search

Back in August I wrote about how Google Image Search and other reverse image search engines are a valuable tool to debunk viral hoaxes. Last week yet another example popped up that shows just how easy these types of debunks can be.

The new example involves social media posts about animal rights and animal testing. Photos of suffering animals are always compelling, and often go viral. While most people sympathize with the animals pictured, there is a secondary lesson here – don’t forget to apply skepticism to viral content even when the message confirms your own beliefs and pet causes.

I’m an animal fan myself – we have both a dog and a cat in our household. The purpose of this post is not to criticize animal rights activists, but show how to verify photos. So lets see how it’s done.

Warning: If you are particularly sensitive to pictures of animals in medical situations, you might not want to see the photo in this post. Try reading my previous post on this topic instead.

Reverse image search as a skeptic tool – with a twist

The Beast of Trowbridge?

I must confess I’ve been remiss in not blogging about this particular topic earlier.  Investigating anomalous photos has always been a skeptic mainstay – for over a century and a half in fact. Ghost photos of one type or another have existed practically since the invention of photography. Those have been subsequently joined by photos of cryptids, UFOs and other alleged anomalous phenomena.

Now that practically everyone has a camera in their pocket all the time (in the form of a mobile phone) photos of this type pop up constantly – along with opportunities to investigate them. And so we need as many skeptics as possible to have some skills in investigating the latest local ghost or UFO photo.  There are just too many of them to send them all to Joe Nickell or Richard Wiseman.

Because photos are ubiquitous, and doctoring photos using software is so incredibly easy, tools for detecting photo manipulation (like FourMatch and Tungstene) are becoming more common.  But software like that can be quite expensive – out of the range of the average skeptic.

But today I’m writing about something far, far simpler.  In fact, it’s an incredibly easy way to detect obvious hoaxes based on stolen or misrepresented photos.  It should be in every skeptic’s toolkit, along with a trick for using it that I’ve never seen suggested before.