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Search forums. Open Talk the place for threads related to digital photography. Even images from the best modern sensors benefit from proper noise reduction NR treatment. To get the best results, it is now necessary to use 3 rd party software, either stand alone or as a Photoshop plug-in. Over the years, dozens of different NR programs have been released, but today, only a handful of them are really worthy of attention, either because of their popularity or effectiveness.
One wonderful site, MichaelAlmond. I found, though, that his reviews were missing some key information and were, at the same time, not organized for quick reference. I hope that you find them useful. That said, I expect to be adding reviews and comparisons of new programs as time permits. Like any other technical procedure, noise reduction has its own jargon.
Any pattern, texture, or coloration introduced into the captured image that is caused by the sensor or related processing rather than the subject can be considered Digital Noise.
It can also be introduced into an image by a scanner. Most noise occurs when heat or extra electric charge in the sensor causes receptors to fire when they should not. Using a high ISO setting on a digital camera allows extra power to the sensor to increase its sensitivity, but also increases the amount of heat, and consequently, the number of misfires in receptors. Chroma Noise : Chroma Noise also called color noise, chromatic noise, etc is exactly that; it is colored pixels introduced into an image that cause color shifts and loss of saturation.
Usually seen in deep shadows. Luminance Noise : Luminance Noise is the most common type of digital noise and is characterized by grainy patterning caused by different luminance levels ie, dark and light in an area that should have had relatively even luminance levels from pixel to pixel.
Although this may appear to be giving some of the less user-friendly software a handicap for the sake of laziness, the fact is that many some of us rely on assistants to process our images who, we fear, are just too daft to be able to use the software to its fullest extent, and we need to know what the software can do by itself.
Alternately, there are instances when we use the software to batch process hundreds or thousands of images, in which cases using the default settings are the only practical option. This will also provide a solid basis for further comparisons. The second time through, the software will be optimized as much as is practical. If the program were to require more than that amount of time to be properly optimized, I would consider it a drawback in any case.
One will contain many smooth, middle to dark tones but minimal color. Another will contain brighter colors, but still mostly smooth tonal gradations. A third photo will contain a considerable amount of mid-level detail throughout, and a fourth will contain more fine detail. The details of each test will be compiled for each program separately and then combined for comparison at the end of the article.
Noise Ninja, aside from having the coolest name of all the programs tested, has been around for a long time and has a good reputation. Yellow dashed boxes in the left window indicate which areas of the image are being used to generate the noise profile. The image to the right can be dragged to change the area that is magnified, or the scroll bars can be used. The interface in general is not extraordinary; it simple and does its job, but is not exactly attractive or innovative.
In automatic mode, Noise Ninja works with mindless ease. If no camera profiles have been configured, the program creates a profile as the plugin opens. Sometimes this works better than others, but in my experience, it has always been better than doing nothing. Noise Ninja seems to be more conservative than other programs in this regard, erring on the side of leaving too much noise rather than removing detail. In fact, the plugin is not intended to be fully automatic. The program includes an image file that displays a pattern of different colored boxes.
This document is intended to be printed and then photographed at a variety of ISO settings. The resulting photos are then analyzed and the settings saved as profile settings which, as a group, comprise a custom camera profile.
Alternately, you can download a profile for your camera from the Noise Ninja website. My results with pre-made profiles have been mediocre, at best, unfortunately.
For some reason, the plugin tends to load the ISO profile settings for my ISO files, which produces an odd, blotchy pattern which is much worse than using auto-profiling. This may be an anomaly with the D80, however. Once the profile has been loaded, it will automatically be used any time the plug-in is called upon to process a picture from a corresponding camera, so this can be considered a one time or few time, if you have a few cameras procedure rather than part of a manual workflow.
With the profile loaded, you can proceed to make any necessary adjustments to the Strength and Smoothness sliders, but adjustments beyond that are rarely necessary. Despite their overall excellence when it comes to documentation, the folks at Picture Code seem to have overlooked mention of the Colors sliders.
There are three of them, and by default, they are set to It does not mention, for example, which slider represents which color. Almond mentions in his review? Whatever the case may be, adjustments with these sliders are not usually necessary… in fact, in my version there is no appreciable difference in the preview window between having all three set to zero or set to The Noise Brush is even better, though, because it allows you to electively mask just the luminance or chroma noise or both, of course… which ends up being functionally the same as using a layer mask.
Not so if you use the Noise Brush … you can save the detail by masking the the luminance NR but remove the speckled colors by allowing the chroma NR. Noise Ninja has good documentation and is quick and easy to use. Its default settings seem to be more conservative than other programs, but manual adjustments are easy. The Noise Brush is a very helpful addition. Wordle, explained. Windows Windows. Most Popular. New Releases.
Desktop Enhancements. Networking Software. Trending from CNET. Download Now. Developer's Description By Imagenomic. Noiseware is a software tool from Imagenomic that is setting the standard for digital image noise reduction.
Noiseware leads the field for speed, quality and ease-of-use in restoring image fidelity by eliminating digital noise and unwanted artifacts introduced by high ISO photography and less than optimal environmental conditions.
Version 4. Full Specifications. What's new in version 4. Date Added July 21, Operating Systems.
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