This plug-in applies a noise-reduction algorithm that may improve the appearance of noisy video. In order to minimize artifacts (image defects caused as a side-effect of image processing), noise reduction is only performed in areas of the frame where the amount of motion falls beneath a certain threshold value.
Motion threshold: This slider governs the threshold value. Moving the slider rightwards increases the amount of motion the effect will tolerate, thus tending to increase the proportion of the image that will be affected. At the same time, the danger of introducing unacceptable artifacts into the video is also increased.