It has become very hard to tell anymore if a picture you see online is real or fake. Now with a little help from Photoshop, and Tim Mathenson’s tutorial, you can tell.
• Open Photoshop
• Open questionable image
• Press CTRL+U or go to Image -> Adjustments -> Hue/Saturation
• Set Hue to low
• Set Saturation to high
• Scroll the light bar back and forth, looking for areas of the image that don’t match
• If you find a splotch of discoloration, that may indicate the picture was retouched.
Tim says this will work on any retouched photo, not just Photoshopped ones.