It’s not big news that celebrities and models get photoshopped all the time, however it was really hard to tell just how much Photoshopping had been done.

Researchers in the Department of Science at Dartmouth College have finally developed a software tool that can rate photos based on how much digital altering has been done. [Read more...]

“We have developed a quantitative and perceptually meaningful metric of photo retouching. Photographs are rated on the degree to which they have been digitally altered by explicitly modeling and estimating geometric and photometric changes. This metric correlates well with perceptual judgments of photo retouching and can be used to objectively judge by how much a retouched photo has strayed from reality.

Below are some sample photos from their research published in the journal of National Academy of Sciences this week.

Fergie

Angelina Jolie

Kim Kardashian

Kim Cattrall

Nina Garcia

Image credits: Glenn Feron

George Clooney

Image credits: gettyimages

Juliet

Image credits: Lorena Sturlese

Candice Huffine

Image credits: V-magazine  | better.net

Extreme Makeover

Image credits: Paulo Arrivabene

Patricia Green Bikini

Image credits: Ricardo Carreon

Toothless Lew

Image credits: Jeanine Price

Carisa

Image credits: Regina Pagles

Portrait

Image credits: Grant Thomas

Portrait

Image credits: Diana Sims