If you remember in Art class. The three primary colors are RGB.
Are Eyes are able to View Electromagnetic Radiation Called Light. The amount of light reflected off a "object" is what we See. (Blacks reflects more light then White)
A Mirror For exp. Is see through. Due to its very low light reflection. Now add Black paint to the mirror. And its no longer see through.
Now lets make the mirror into Clothes. Clothes by nature have Natural "color.", ie Radiation Reflection. (Depending on the Color, Thickness and meterial used.) White Cotton is a natural See "through". When Illuminated with a lot of light.
When a Celebrity gets Illuminated By Flash. Large Amounts of Electromagnetic Radiation Goes past the Clothes. And is reflected By the Body. This Contrast leads To "Flesh" being seen underneath. (ie Kerry's Daughter for exp.)
Photoshop Has a Auto levels Feature. That adds to the available Colors Spectrum Seen by the human Eye. It Mixes Background Black, White and Gray Colors to the Picture. By Adding extra "colors" to the picture. (Black becomes blacker. And the same with the other Colors.)
By Adding Colors to the picture. It Becomes to the Human Eye. Like a Flash Illumination To Clothes. It adds more Contrasting colors. And allows Us to see more "flesh" Underneath. (please note. A higher resolution picture allows more "reflected" light underneath the clothes to be exposed to "Visable light". Exp The previous Sarah White picture Had tiny holes in it. Those Holes Were Enhanced, and the Skin underneath was revealed more. In a Smaller pic, The Flesh Reflection is few and far between. Which forces me to add Flesh colored Pixels to add contrast. With Higher resolutions More flesh pixels are exposed. Allowing Auto levels to have more of a Chance to illuminate whats underneath.)
http://www.indospectrum.com/articles...op/levels.html
http://handprint.com/HP/WCL/color1.html
Please note, Sometimes it works. "As clearly shown". Sometimes it doesn't. There are Ways to add contrast to the picture outside "auto levels" Adding mid-level colors for contrast, Decreasing\increasing Brightness(BW), Saturation ie Color Brightness (RGB), Making layers and adding similiar Colors, etc.
Think of Photoshop as a Bright Neon light For the Human eye.
For Woman: If you want Voyuers to not see what's Underneath. Wear padded Colored Bra's with many Colors. Wear Panties with speckles, swirls, etc. Wear colored clothes Not similiar to each other.
I hope That Helps???