|I used this a lot before I started using Photoshop CS2.
However, I am still so comfortable with it that I even use it with
Photoshop CS2, although Adobe has added new sharpening options to
Photoshop CS2. I mainly use this when I want to sharpen an image,
if I resample up and increase its size. However, I only use it for
small changes, not massive ones. For those I use Genuine Fractals 4
Print Pro. This process is used to prevent haloing of pixels, which
can happen when you work in a color channel. It uses the Lab mode
color space in the lightness channel. When I change the size of an
image, often there is a degradation in quality. I have found a few
ways to minimize this effect. Step One I enlarge in small
increments. Let's say I had a web image that was 800 x 600 pixels
at 72 dpi and I wanted to print a small version at 300 dpi. The
first thing I would do to get an order of magnitude is uncheck the
Resample Image button, and type in 300.
m new here and an avid photographer as a hobbiest and just entering the world of digital photography so ever little tidbit of info that i learn is greatly appreciated this whole 35mm to digital is freaky but Banzai! thanks Paula im sure I`ll try it
The main problem with this method is that the unsharp mask simply sharpens everything. In fact: there is no sharpening at all. What really happens is that the filter (and all sharpening filters) increases the difference between neighbouring pixels. One can set the minimum difference that is needed to get a "sharpening" effect, but there is no choice where exactly this will happen. So for example grain is also "sharpened". Which is why it is best to use an edge mask. An edge mask is a mask that protects everything except the edges. When you then use sharpening, only the edges are sharpened. Creating an edge mask is not that difficult: duplicate the channel with the best contrast and work on that. Take the stylize>find edges filter and invert the result. Then use Noise>Median set to some 2 to get clear edges. Now make the edges thicker with Other>Maximum set to some 4. Next step is to blur this with Gaussian Blur set to the same value as the one you used for maximum. Go back to composite view and click the mask (channel) you created. You can now use a much higher value of unsharp mask as everything is protcted, except for the edges.