Removing Grain from Clips

The Remove Grain operator is a general noise reducer that removes noise, softens the image, and selectively restores the sharp details of an image.

In some cases, it may be best to remove the grain completely, and then manually restore the desired amount of grain using the Add Grain operator. In other cases, you may have material with completely different grain signatures that need to be composited together. It is then a good idea to remove the grain from one, and give it the grain of the other.

With the Remove Grain operator, you can:

• Remove grain from a film-originating image to transfer or match it to video quality.
• Remove film grain from old film footage.
• Remove noise on video clips.
• Reduce the size of grain on images printed on film that was push-processed to compensate for overexposure or underexposure.
• De-grain images before creating a matte in order to obtain a more precise result.

Note: The amount of grain existing in each channel of a color is not generally uniform. Usually the blue channel contains more grain than the red or green channels. Therefore, you obtain the best results using the Remove Grain operator if you de-grain each color channel separately.