ADOBE AFTER EFFECTS 7.0
User Guide
417
To modify the range of Hue/Saturation effect adjustments
1
From the Channel Control menu, choose an individual color. (By default, the range of color selected when you
choose a color component is 30˚ wide, with 30˚ of fall-off on either side. Setting the fall-off too low can produce
dithering in the image.)
2
Do any of the following:
•
Drag one or both of the white triangles to adjust the amount of feather without affecting the range.
•
Drag one or both of the vertical white bars to adjust the range. Increasing the range decreases the fall-off, and vice
versa.
Leave Color effect
The Leave Color effect removes all the colors from a layer except those similar to a given color. For example, a movie
of a basketball game could be decolored except for the orange of the ball itself. The layer’s quality setting does not
affect Leave Color.
This effect works with 8-bpc color.
Original (left), and with effect applied (right)
Adjust the following controls for the Leave Color effect:
Amount To Decolor
Specifies how much color is removed from the layer. A setting of 100% causes the areas of the
image dissimilar to the selected color to appear as shades of gray. At 50%, those areas lose half of their color
saturation.
Color To Leave
Specifies the color that is to be left untouched.
Tolerance
Specifies how closely the effect matches colors. A value of 0% decolors all areas of the image except those
that match the Color To Leave exactly. A value of 100% causes no color change.
Edge Softness
Specifies the sharpness of the color boundaries. High values smooth the transition from color to gray.
Match Colors
Specifies the color model to use for similarity. RGB uses the RGB color space to determine which areas
are decolored. Match Colors is a strict matching technique and usually decolors more of the image than Hue. Hue
uses hue (color) to determine which areas are decolored; in other words, choosing light blue as the Color To Leave
also leaves dark blue, since both colors have the same hue.
Levels effect
The Levels effect remaps the range of input color levels onto a new range of output color levels, and changes the
gamma correction curve at the same time. The Levels effect is useful for basic image quality adjustment. This effect
functions the same as the Levels adjustment in Photoshop and appears in the same way if monitor calibration is off.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
