Lyric Levels Bandpass
The Lyric Levels Bandpass filter is a stylizing effect that can produce a range of special image effects by clipping image values that are outside a band of luminance levels set by two threshold sliders. The clipped portions of the image can be replaced by foreground and background colors or the individual RGB channels can be clipped under the bandpass.
The Lyric Levels Bandpass filter includes a set of effect controls that are common across all Lyric effect filters. For a detailed description of these controls, please see the Common Effect Controls documentation.
Additionally, all Lyric Effect filters can be applied through mattes or masks to constrain the filter effect to particular areas of the image. For background information on mattes and masks, please refer to the Lyric Matte Primer.
The Mode dropdown menu selects the bandpass clipping mode. In the descriptions below, the bandpass is that portion of the source video image with luminance levels that fall between the Black Threshold and the White Threshold slider values. The edges of the bandpass can be softened by a threshold rolloff set by the Rolloff slider.
Source over Foreground/Background causes the portions of the image brighter than the white threshold to be replaced by the foreground color and those darker than the black threshold to be replaced by the background color, leaving the source video within the bandpass levels unchanged.
Foreground over Background causes the portions of the image with brightness levels inside the bandpass to be replaced by the foreground color and those outside to be set to the background color.
Alpha effects only the alpha-channel over the source video, setting it so that only the bandpass portions of the image are visible. This mode is used if you want to composite the bandpass portions of the image over another video or image source in a lower track.
RGB causes the individual R, G and B channels to be clipped by the bandpass, forcing the values in each channel outside the level bandpass to be set to 0 and those within it to be set to the maximum channel value, with a rolloff at the edges set by the Rolloff slider. This has the effect of pushing the various brightness levels in the image to vivid primary or secondary colors.
The Theshold sliders set the lower & upper edges of the levels bandpass. Note that if you set the black threshold to 0 or white to 255, the other slider becomes a simple image threshold control. The Rolloff slider controls the smoothness of the transition across the edges of the bandpass, high values make the transitions very smooth, low values make it hard and pixelated.
Foreground Color and Background Color set colors to be used in the modes that use these colors and Switch Colors provides a quick way to swap foreground & background colors.
The Effect Controls section is a set of common controls that are documented on the Common Effect Controls page. They can be used to achieve masked and other specialized filter effects.
= Source over FG/BG
= Source over FG/BG