noise filter (combine) for Mac iMovie plugin removes low-light noise
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noise filter (combine) for Mac Description

This iMovie plug-in takes a page out of elementary noise reduction school. But who says that simple principles don't work? We have developed this plug after an email from Kevin Killion, who pointed us to a simple way astronomers reduce background noise in their photographs: they digitally combine, and then average multiple pictures of the same part of the sky. Of course, with moving media the results can be less than stellar (pun intented). We found out that it does work, especially if you have a clip filmed under high-gain, low-light conditions. Our plug works by combining the last n (user configurable from 1 to 10) frames, and averaging them. Therefore, if you have any fast-moving objects in the clip, they will exhibit ghost trails. Depending on their speed, these trails will be more or less pronounced. Very fast objects (i.e those that appear in only one or two frames) will disappear entirely (which is, of course, the definition of noise reduction). In short: this plug-in removes noise from low-light clips. And if you crank up the 'combine' parameter, you also have a cool ghost trail for moving objects.

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