In today's world, there are three types of photos -- real, enhanced, and fantasy (also called collage, "Photoshopped", and fake). For arguments sake, I'm calling any image taken in a single camera exposure as a real image, whether shot on film, as part of a video stream, or digitally recorded. Real images can often be so amazing (or so staged) that they appear to be fantasy or computer manipulated, and we could spend several more articles trying to narrow down when an image turns from real to fake (or whether anything but the RAW file on a digital camera qualifies). But in between the two categories you have a middle classification: fixed/retouched. Again, for arguments sake (or lack of argument) the fixed or enhanced rating means changes have been made to real images without altering their real status, such as cropping, normal white balance to remove color casts, and minor levels of sharpening and global exposure correction. Fixed and enhanced photos would also include color images converted from color to black and white, or those that use special effects filters such as softfocus techniques, creative filters for glamour, etc. Safe tools would include normal amounts burning and dodging, curve adjustments, and selective amounts of sharpening -- as long as the changes didn't dramatically alter the "content" of the photo. Think that definition is too broad? Voice your opinion on the forums -- but realize that in no way am I describing images that are to be used in news stories or where the veracity of a photo is an important consideration.