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Wed, May 12, 2010 8:48 pm

Detecting Altered Images

If you see an image posted somewhere on the Internet or have one sent to you by email that you suspect has been " photoshopped", i.e. digitally altered, are there any methods that will assist you in making that determination? There are indeed methods and tools to assist you. If the image is a jpeg image, you can upload the image or submit the URL for its location on the web to the Image Error Level Analyzer. Additional information on how to detect "shopped" images can be found at Body By Victoria and Photoshopping and Digital Forensics.

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Mon, Jun 02, 2008 6:53 pm

Photoshopping and Digital Forensics

A lot of photos you see posted on the web or sent around by email may have been "photoshopped", i.e. doctored in an image editing program, such as Adobe's Photoshop graphics program. Such photo manipulation has been going on since before the advent of Photoshop, though.A Scientific American article, Digital Forensics: 5 Ways to Spot a Fake Photo, published on June 2, 2008, details techniques that can be used to determine when photos have been digitally altered.

There is an article The Reuters Photo Scandal that discusses the manipulation of images and the staging of photos for political purposes.

[/os/windows/software/graphics/adobe/photoshop] permanent link

Sat, Sep 23, 2006 7:26 pm

Adobe Photoshop CS2 Saving Files in Incorrect Format

I encountered a problem with Adobe Photoshop CS2 version 9.0 on a system where Photoshop would not correctly save a file when the "Save As" option was used. You could pick whatever format you chose, but Photoshop would always save the file as a Photoshop PSD file. Oh, you could have it put on the extension for the desired format, e.g. somefile.jpg, but the contents of the file would be in PSD format. If you chose "Save for Web" instead of "Save As" you could save the file correctly in the chosen format, e.g. JPG.

I was finally able to resolve the problem by holding down the Ctrl, Alt, and Shift keys while starting Photoshop to have it wipe out its stored settings

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