Software to identify if a photo has been altered/ photoshopped
But did you ever thought how the computer forensics dept. or any other federal agencies analyze if a photo is original or has been altered using any image editing software. There is a software named 'JPEGSnoop' that uses one of the all techniques implemented in computer forensics that compares the JPEG quantification table to determine if any change has been made in a photo using any image editing software. Different cameras use different quantization tables. Adobe Photoshop and other image editing software also have their own distinct quantization tables. When a photo is opened up in an editing program, photoshop for instance, it re-codes the original quantization table into its own. This enables you to work with the image and alter it. However, when the image is saved, it is saved with the quantization table of the image editing program. As a result, software can tell if a photo has been run through Photoshop or came from a so...

not bad
ReplyDelete