Site Directory Home Page About / Contact Site Search / Links Photoshop Articles & Tutorials Auto Contrast Better Blue Sky Crooked Pictures Photoshop Tips Haze Removal History Brush Hot-Key Action Perspective Correction Rubber Stamp Tool Skin Tone Correction Smart Blur Texas 2-Step Sharpening Action Unsharp Mask + Fade Miscellaneous Articles Action Photography Aperture Diffraction D1X Mystery Pixels D2H Skin Tones D30 & D60 Color Fix LCD Viewfinder Ideas Multiplier Effect Nikon D1 Color Fix Printing & Processing QM Pro for Noise Why Shoot Raw? Digital SLR Camera Reviews Contax N Digital Canon EOS D30 Canon EOS 1D Fuji S1 Pro Fuji S2 Pro Kodak DCS 315 Kodak DCS 620 Kodak DCS 620x Kodak DCS 760 Kodak DCS Pro14n Kodak 645M ProBack Nikon D100 Nikon D1 / D1H / D1X Nikon D2H Nikon D2X Olympus E1 Point & Shoot Camera Reviews Agfa ePhoto 1680 Nikon Coolpix 700 Nikon Coolpix 800 Nikon Coolpix 900 Nikon Coolpix 950 Nikon Coolpix 990 Nikon Coolpix 995 Nikon Coolpix 5700 Other Reviews Flash Accessories Kodak 8500 Printer Olympus P-11 Printer Sigma 50-500 Lens

Best viewed at 1024 x 768 or greater screen resolution, 16 bit color or better. All content & photographs copyrighted, all rights reserved.   Smart Blur: Adobe Photoshop noise & grain reduction filter. Seldom-used tool works without adversely affecting image sharpness. Below: ISO 1600 Nikon D1H action shot of a top fuel dragster at 300+ miles per hour during a nighttime qualifying session. A great picture, but look at the high ISO noise & grain, especially in the shadows. Click to enlarge (1200 x 787 pixel view) What does Smart Blur do? It smoothes out grain and noise patterns between edges without adversely affecting image sharpness or fine detail. The Smart Blur filter is located in Adobe Photoshop's menu bar under Filter / Blur / Smart Blur...         Operational notes: The default values for the Smart Blur filter are Radius 3.0, Threshold 25.0, Quality Low, and Mode Normal. I vary my Radius settings anywhere between 0.5 and 3.0, and seldom (if ever) go above or below this range. The live preview screen in the Smart Blur box shows the effect as you change the radius values to suit your taste for the picture at hand. I rarely modify the default Threshold value, I've found that the default value of 25 seems to be perfect in most cases. I use High Quality rather than the default Low setting. High Quality seems to produce a cleaner, smoother looking image. And I leave the Mode set at Normal. Below: After Smart Blur. Image color, sharpness & important detail are retained, noise & grain are virtually eliminated. Click to enlarge (1200 x 787 pixel view) More notes: Smart Blur can be really good for correcting ruddy, blotchy skin tones in high ISO pictures. Low radius values (0.5 to 0.8) will be necessary to retain natural looking skin textures. If closeup fine detail appears degraded after applying the Smart Blur filter, lower threshold values to around 15 or so. Smart Blur is not always the be-all, end-all, world's best noise reduction filter. But for some pictures, nothing works better and easier. It's simply another useful option.