details czyli threshold w photoshopie okresla od jakiego poziomu aplikuje wyostrzanie
jak ktos spika english polecam artykul na wikipedii, ktory dokladnie i dosc sensownym jezykiem opisuje jak funkcja dziala - w sensie bez nadmiernego skomplikowania
tak oglednie mowiac, wyostrzanie to tak naprawde zwiekszanie kontrastu na krawedziach
http://en.wikipedia.org/wiki/Unsharp_masking Amount is listed as a percentage, and controls the magnitude of each overshoot (how much darker and how much lighter the edge borders become). This can also be thought of as how much contrast is added at the edges. It does not affect the width of the edge rims.
Radius affects the size of the edges to be enhanced or how wide the edge rims become, so a smaller radius enhances smaller-scale detail. Higher Radius values can cause halos at the edges, a detectable faint light rim around objects. Fine detail needs a smaller Radius. Radius and Amount interact; reducing one allows more of the other.
Threshold controls the minimum brightness change that will be sharpened or how far apart adjacent tonal values have to be before the filter does anything. This lack of action is important to prevent smooth areas from becoming speckled. The threshold setting can be used to sharpen more-pronounced edges, while leaving subtler edges untouched. Low values should sharpen more because fewer areas are excluded. Higher threshold values exclude areas of lower contrast.
