Gamma is a little known option to better looking photos. You've seen "gamma" before...such as gamma rays (kind of Star Trek-ish) and gamma on your monitor adjustments. Pretty common, but what does it mean? Here is a pretty clear description of gamma in Photoshop:
Images which are not properly corrected can look either bleached out, or too dark. Trying to reproduce colors accurately also requires some knowledge of gamma. Varying the amount of gamma correction changes not only the brightness, but also the ratios of red to green to blue.
You can find this adjustment under Images / Exposure in Photoshop... get ready to be amazed at how much better your color will be.I've included a sample of an original and then with gamma adjustment... a bit exagerated to show the difference. Have fun with it and see what you can create today.