Joe's Filters: Joe's Threshold and PosterizeA multi-function threshold plugin for Final Cut Pro for reducing the number of image values.
The Joe's Threshold and Posterize plugin is a part of Joe's Filters, shareware utility and image processing effects for Final Cut Pro.
What it does
Joe's Threshold and Posterize offers an extended set of thresholding controls for Final Cut Pro. A basic Threshold filter defines the breaking point between black and white, this filter adds the ability to set a number of steps (posterization) between the extremes. Basic desaturation controls can desaturate the image to result in a black and white or color posterized image. Additionally, the filter can pre and post blur the filtered image to soften edges and extend the filter's usefulness.
Applying a two-step threshold to a color image usually results in 6 colors plus black and white. This happens because the threshold applies to each color channel. Two values of Red, Green and Blue mix together to produce all of the primary and secondary colors and white (when all channels are full strength) and black (when all channels are completely off). Desaturating an image before thresholding will result in a black and white image.
Thresholding by it's nature produces hard edges which don't translate well to video. Adding a post-blur can help soften the image and reduce edge-crawl and other video artifacts that result from sharp, high-contrast edges.
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