There is some noise that can be useful and is called dither. They're caused by a number of situations such as a high resolution on a comparably small sensor, amplification of the sensor's reaction to light and even heat given from neighbouring pixels. There are several different types of noise that can affect your pictures such as salt & pepper, Gaussian (amplifier), uniform, film grain and non-isotropic noise. Nik Dfine 2 costs $99.95 / 99.95 Euros, or $69.95 / 69.95 Euros to upgrade from version one. As with those two products, Dfine works as a plug-in for your Photoshop, Lightroom or Aperture programs. There's also the same U Point technology that we saw in our reviews of HDR Efex Pro and Color Efex Pro software packages. Building on the initial version, new features include an improved noise reduction engine with automatic profiling, an improved user interface and if you're a Photoshop or Lightroom user, you can enjoy a powerful selective tool, smart filter compatibility and multi-image support. Dfine 2.0 is the second edition of noise reduction software by Nik software.
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