Adobe After Effects CS3 Manual do Utilizador descarregar pdf (Página 400)

AFTER EFFECTS CS3

User Guide

395

Note: When you animate the Output Cycle, a triangle’s position and color are interpolated between keyframes. For best

results, make sure that all keyframes have the same number of Output Cycle triangles.

Cycle Repetitions HowmanyiterationsoftheOutputCycletheinputcolorrangeismappedto.Thedefaultvalueof

1mapstheinputrangetooneiterationoftheOutputCycle,frominputblackatthetopoftheOutputCyclewheel,

clockwisetoinputwhiteatthetopoftheOutputCyclewheel.Avalueof2mapstheinputrangetotwoiterationsof

the Output Cycle. Use this option to create a simple palette and repeat it many times throughout a gradient.

Interpolate Palette Colors between triangles are interpolated smoothly. When this option is deselected, output

colors are posterized.

Modify controls

Modify controls specify which color attributes are modified by the Colorama effect. For subtle refinement of images,

choose the same color attribute for Input Phase and Modify. For example, choose Hue from both menus to simply

adjust Hue.

Modify The color attribute to modify.

Modify Alpha Modifies alpha channel values.

Note: If you apply Colorama to a layer with an alpha channel, and the Output Cycle doesn’t contain alpha information,

the anti-aliased edges of the layer may appear pixelated. To smooth the edges, deselect Modify Alpha. If Modify Alpha is

selected and the Output Cycle contains alpha information, the output is affected even if you’ve selected None from the

Modify menu. Using this method, you can adjust the levels of just the alpha channel without also changing the RGB

information.

Change Empty Pixels The Colorama effect’s influence extends to transparent pixels. (This setting works only if

Modify Alpha is selected.)

Pixel Selection, Masking, and other controls

These controls determine which pixels are affected. For the Matching controls for Pixel Selection to work, Matching

Mode must be set to anything other than Off.

Matching Color The center of the range of colors of pixels to be affected by the Colorama effect. To select a specific

color in the image using the eyedropper, turn off the Colorama effect temporarily by clicking its Effect switch in

the Effect Controls panel.

Matching Tolerance How far a color can be from Matching Color and still be affected by the Colorama effect. When

MatchingToleranceis0,onlytheexactcolorselectedforMatchingColorisaffectedbyColorama.WhenMatching

Tolerance is 1, all colors are matched; this value essentially turns Matching Mode off.

Matching Softness How smoothly the matched pixels blend into the rest of the image. For example, if you have an

image of a man wearing a red shirt and blue pants, and you want to change the color of the pants from blue to red,

subtly adjust Matching Softness to spread the matching from the blue in the pants into the shadows of the pants folds.

Ifyouadjustittoohigh,thematchingspreadstotheblueofthesky;ifyouadjustitevenhigher,thematchingspreads

to his red shirt.

Matching Mode What color attributes are compared to determine matching. In general, use RGB for high-contrast

graphics and Chroma for photographic images.

Mask Layer The layer to use as a matte. Masking Mode specifies what attribute of the Mask Layer is used to define

the matte.

Composite Over Layer Showsmodifiedpixelscompositedontopoftheoriginallayer.Deselectthisoptiontoshow

only modified pixels.

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Adobe After Effects CS3 Manual do Utilizador Página 400

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