Adobe After Effects CS4 Manual de usuario descargar pdf (Pagina 465)

100

101

459

USING AFTER EFFECTS CS4

Effects and animation presets

Last updated 12/21/2009

White Point Place this point on a bright area to stabilize.

Sample Size Radius, in pixels, of sampled areas.

More Help topics

“Color correction and adjustment” on page 279

Colorama effect

The Colorama effect is a versatile and powerful effect for converting and animating colors in an image. Using the

Colorama effect, you can subtly tint an image or radically change its color palette.

Colorama works by first converting a specified color attribute to grayscale and then remapping the grayscale values to

one or more cycles of the specified output color palette. One cycle of the output color palette appears on the Output

Cycle wheel. Black pixels are mapped to the color at the top of the wheel; increasingly lighter grays are mapped to

successive colors going clockwise around the wheel. For example, with the default Hue Cycle palette, pixels

corresponding to black become red, while pixels corresponding to 50% gray become cyan.

This effect works with 8-bpc and 16-bpc color.

Guy Chen provides an example on the After Effects Exchange on the Adobe website that uses the Fractal Noise effect

to generate the base noise (in this case for the turbulent surface of the Sun) and then colorizes the noise with the

Colorama effect.

Input Phase controls

Get Phase From The color attribute to use as input. Choose Zero to use a color attribute from another layer.

Add Phase The second layer to use as input. To use only this layer as input, select Zero for Get Phase From; otherwise,

both the Add Phase layer and the layer to which the effect is applied are used. You can choose the layer to which the

effect is applied to add a second input attribute from the same layer.

Add Phase From The color attribute from the second layer to use as input.

Add Mode How input values are combined:

• Wrap Adds the values of the two attributes for each pixel. Values above 100% are wrapped around the cycle again.

For example, a sum of 125% wraps around to 25%.

• Clamp Adds the values of the two attributes for each pixel. Values above 100% are clipped to 100%.

• Average Averages the values of the two attributes for each pixel. Because the average of two values that are each

in the range 0% to 100% is never over 100%, wrapping and clamping by this operation are never necessary. Average is

therefore the safest option for predictable output.

• Screen Screens the second layer over the original layer; the brighter areas in the second layer brighten the first

layer, and the darker areas in the second layer are discarded. Screen mode is especially useful for compositing fire, lens

flares, and other lighting effects.

Phase Shift The point on the Output Cycle wheel at which the mapping of the input colors begins. A positive value

moves the starting point clockwise around the Output Cycle wheel.

Animate Phase Shift to cycle colors around the wheel.

1 2 ... 460 461 462 463 464 465 466 467 468 469 470 ... 777 778

Comentarios a estos manuales

Sin comentarios

Adobe After Effects CS4 Manual de usuario Pagina 465

Comentarios a estos manuales

Relacionado con productos y manuales para Software Adobe After Effects CS4