Martyn Lewis Photography

Yorkshire based photographer - Weddings, Automotive, Landscape, Portrait & Studio Photography

Digital Forensics: Has an image been digitally altered?

clock November 8, 2010 13:30 by author Martyn

I've had a few queries from people asking me how I produced my image for day 3; "If..." Now quite obviously, I've used a little bit of photoshop wizardy to remove my own head, and place it elsewhere in the image - well, at least I thought that was obvious - apparently not, to several of my twitter and facebook followers out there!

They've written to ask how I did it?!

That got me thinking, and reminded me of a website I strayed across while working on something completely different, a few days ago:

Slip a photo URL into the Analyzer (jpegs only i'm afraid), and like something that Spooks would employ, it sneaks off, does some analysis, and then highlights the possible areas of alteration within an image.

How does it work? Well it's certainly not magic, but simply the tool looks for decreases in the quality of a jpeg image that occurs every time it is saved. These areas are more than likely not visible to the human eye, but highlighted by this tool...

I find it interesting to look at images created by some of my favourite self portrait 'togs, to see just how many photo's, sections of photo's and edits they use to create some of their most spectacular imagery...

We all know, most image have been altered, enhanced and bits chopped and changed all of the time, Some of the tog's even do how-to's on their blogs explaining how they create the images in Photoshop, or Gimp, and this useful tool goes some way to helping you figure out just how...

Rosie Hardy's "the canadians have landed..." - Analysis results here. (I Love this shot!) - Hey, those guys, that plane and that foreground are all from different images! (Highlighted in white...)

Miss Aniela's "Flying Solo": Analysis results here - Those legs and that frame stick out an awful lot from the background image! So does that bow! ;-)

Hope the 'togs in question don't mind me usng them as examples!


Weirdly though... my "If..." image comes up as reasonably uniform... so maybe i do have the ability to take off my head, after all? ;-) Mwah hah ha ha hah! I'm Featured!

clock November 5, 2010 13:00 by author Martyn

Today, and for the next 22 hours, I'm featured on's page here! is an innovative website that converts twitter feeds into a newspaper-like webpage, for users to browse on a daily basis - Think of it like the UK's Heat magazine, condensing all of the latest gossip and events into one place, only a little more intellectual!

Click through to, via the screen capture below:


Octobers Summary

clock November 2, 2010 15:10 by author Martyn

In October, according to my web stats, I had many, many thousands of unique visitors to my blog and photo galleries!  That's quite a feat, given that It's only gone 'live' a few weeks ago!

By far, the most popular page has been my blog, which isn't unexpected I guess as it's the most interesting!  The largest referers to my site were off the back of 'retweets' on twitter, from Rosie Hardy (Amazing photographer) and Pollyanna Woodward (Gadget Show presenter).  I guess that having so many followers for each of them (6000 & 15,000), and so many people hanging on every word they utter, really does pay dividends! Maybe I'll be that succesful with my blog, flickr stream and twitter updates in the future...

My Aim now?! To get Lady Gaga to retweet me something!! With 6,967,294 followers, imagine the traffic that would flow my way?!  Working on the traffic from the two exquisite young tweeters above, it would seem that if somebody like Lady Gaga retweeted a link to an article I've written or a shot I've photographed, I'd should get around 5% of the followers that subscribe to her... that would be an amazing 350,000 people visiting... I think my webserver would fall over?!

Maybe I should set my aim a little lower - although still pretty high in terms of popularity:
The UK's most popular: (According to TwitHollic)

  1. Coldplay (@ColdPlay) with 3,222,139
  2. Lilly Allen(@LillyRoseAllen) with 1,914,698
  3. Stephen Fry (@StephenFry)* with 2,440,248

Mr. Fry would seem the most obvious candidate, being an avid  technologist - maybe he'll retweet my Disaster Recovery link, if i asked him nicely?! With his followers being intelligent and articulate enough to be interested, it could net 95735 new visitors...!

This month my visitors, have come from all over the globe: and to celebrate, here's a thank you pic of me, made up of all of the national flags from: United Kingdom, United States, Germany, Canada, Australia, Netherlands, Philippines, France, Spain, Israel, Poland, Russian Federation, Portugal, Lithuania, Belgium, New Zealand, Czech Republic, Sweden, Norway, Brazil, Fiji, Hungary, Ireland, Chile, United Arab Emirates, Argentina, Colombia, Italy, Macao, Malaysia, Singapore, Panama, Serbia, Qatar and finally, Austria...

 * you do have to wonder about the state of the world, when globally, Miley Cyrus and MC Hammer have a bigger global following than Stephen Fry though, don't you think?!

About the author

Martyn Lewis grew up in Weardale, Durham, spoilt by the wonderful surroundings of the North Pennines.  He graduated from Newcastle University, before completing an MSc at Durham University in 2001.




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