Adobe 25510629 User Guide - Page 36
Graphically represents the Start Threshold, Transparency, and Alpha, Matte Generation area
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Load: Loads saved settings, letting you transfer keyer settings from one session to another with clips using similar lighting. Save: Saves the current settings, but not the key points. This lets you save your work so that you can further experiment, or transfer keyer settings from one session to another with clips using similar lighting. Magnify Preview: This slider is one method for zooming on the Output Preview Monitor. For more information, see "Magnifying and repositioning the view in the monitors" on page 33. Matte Generation area Start Threshold: Changes the range of colors that are accepted as transparent. You typically use this control if uneven lighting creates noise in the key. Transparency: Controls the overall transparency of the source video. This control increases the range of transparency of the reference key color background, starting at the center (reference color) and moving outward into the surrounding hues. This information is displayed visually in the Alpha Curve graph. Highlights: Controls the transparency in the lighter areas of the source video. Shadows: Controls the transparency in the darker areas of the source clip. Sensitivity: Controls the range of color accepted in proximity to the key color background. This control is useful for cleaning up the rough edges on dark foregrounds. Alpha Curve: Increases and decreases the edge softness on the keyed source. This information is displayed visually in the Alpha Curve graph. Alpha Curve graph: Graphically represents the Start Threshold, Transparency, and Alpha Curve settings. The following example explains how to read this graph. 36 Product overview