Plugin Solutions For Final Cut Pro, Color, & Motion
    Color Plugins

G Smart Denoise
G Smart Denoise 5x5
G Smart Denoise 7x7

These nodes are designed to be powerful noise reduction tools. The smart denoise algorithm uses an edge dependent averaging function so that the noise or grain gets removed without blurring edges.

G Smart Denoise

The nodes can also be used as edge dependent sharpening tools. The sharpening is set so that it only sharpens edges, not noise or grain. To use in a pure sharpening mode, set the Noise Remove Amount to zero. This will stop the node removing any noise, but allow the sharpening to function.

Noise Remove Amount 0 to 1 A setting of 1 is full noise removal. If you need more noise removal than this, you may have to use more than one G Smart Denoise node in a chain. Any setting less than 1 blends the noise removal with the original image so you can control it so just the right amount of noise is removed.
Sharpness 0 to 2 Sharpness adds a small amount of edge-only sharpness to the image. This control will not, by design, sharpen any noise or grain. Going beyond 1 may introduce ringing artifacts on edges. The sharpness control is independent of Noise Remove Amount. By setting Noise Remove Amount to zero, you can use the Sharpness control to sharpen edges only, without either affecting or removing noise. Bias control effects sharpening.
Antialias 0 to 1 Because smart noise removal is edge dependent, it can have the effect of sharpening edges. If this effect is too strong, it can lead to aliasing (stair step) artifacts. Use this control to selectively blur such edges. Bias control can also help avoid aliasing artifacts.
Bias -1 to 1 Bias control the way in which the smart denoise algorithm deals with noise and edges. By adding or subtracting the bias, the algorithm can be fine-tuned to your image and denoise preference. Increasing the bias will remove less noise, but create better edges, and similarly, decreasing bias will remove more noise, but could over sharpen, or in extreme settings, over blur the edges. Bias, ideally, should be as high as possible without it being so high that your unwanted noise is not removed.

To get the best quality out of the G Smart Denoise nodes, it’s important to pick the right one. Using the table below as a guide, pick the best version for your needs. If the filter size is too big, you’ll loose detail, and similarly, if it’s too small, you’ll not remove all the noise.

Once applied, adjust the bias control to get the best balance between edges and noise. The best setting is one which is small enough to remove all the noise, but large enough to keep edges looking good. In practice, I increase the value of bias until the noise starts to appear, and then back off slightly.

Use for...
Filter Size
G Smart Denoise Heavy noise reduction of large sized noise or grain Use for the most powerful noise reduction. Can make resulting image look plastic if used to excess.
G Smart Denoise 7x7 Medium sized noise or grain.  
G Smart Denoise 5x5 Fine noise reduction suitable for video noise or very fine grain. Helps retain full detail in image, but might miss removing larger grain or noise.


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