Amanda writes: >> Can anyone recommend a good method for sharpening images where there is a lot of noise present?. <<
Reduce the noise first and or sharpen the least noisy channels...(more below). Dupe your RGB file. Convert the dupe to CMYK (often the legacy custom CMYK engine UCR or Light Black GCR is a good choice). Select the cyan and the black channels (for a skintone for example). Sharpen away. Often do this in a duped layer set to luminosity blend mode with some additions as noted here: http://members.ozemail.com.au/~binaryfx/ST_USM1.html Then flatten and drag this as a layer back to your RGB file and blend in luminosity mode, so that the wider RGB gamut is not lost from the file which has had it's gamut reduced in CMYK for the advantage of the four plates which are often better than the three of RGB. You may need to adjust the endpoints if the CMYK trip has lost a bit of contrast. Links to more on grain/noise reduction can be found here: http://members.ozemail.com.au/~binaryfx/PSTV_links.html#G (grain/noise links section) Links to more on sharpening can be found here: http://members.ozemail.com.au/~binaryfx/PSTV_links.html#S (scroll to the USM links section) Hope this helps, Stephen Marsh. =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
