Jim Bob wrote:
Geesus Gene. Contrast has to do with the range between the lightest and darkest portions of an image. It is not the same as sharpening. What planet are you from?
If you read the link I provided, you would have a better understanding of what contrast has to do with sharpening, and that there are varying levels of contrast, from full-image coarse contrast adjustments that you describe when you say "Contrast has to do with the range between the lightest and darkest portions of an image" micro contrast, which narrows down what the contrast adjustment is applied to, all the way to high-pass, where you are only sharpening the edges. Each of these methods can be applied over a range of radii, to achieve the best sharpening of detail without sharpening noise.
You might also read material by Jeff Schewe, for instance, this piece:
http://www.pixelgenius.com/tips/schewe-sharpening.pdfwhere he states, on the first page "What [Unsharp mask] basically does is increase the image contrast between light and dark pixels. The idea is to process the light slide of edges to be a bit lighter, and the dark side to be a bit darker."
So, sharpening is just a manipulation of contrast at the pixel level, or in your terms, the range of contrast between the lightest and darkest portions of tiny parts of the image - which in essence, is a very targeted application of contrast adjustment.
Now, on a personal note, try to add something of value to a thread, rather than take shots at others who are trying to do that, just because you don't understand or don't agree with them. I have yet to see any constructive or positive posts, with useful information, but I do see a lot of personal attack, rudeness, and other undesirable language and attitude. Ask yourself if your approach to forum etiquette is in your best interest, and if you can actually provide useful information that is not in the form of a complaint about someone else.
Don't take it personally, or do, I really don't care one way or the other - it just spoils an otherwise good discussion. And yes, if you are going to make incorrect statements without backup or clear rationale, for the sake of the OP, I will correct you. So expect it. And it won't be in the form of asking a stupid question like "what planet are you from?" That's just plain childish.