Adobe Premiere Pro CS4 - Manual (Page 376)

370 USING ADOBE PREMIERE PRO CS4
Effects and transitions
Last updated 11/6/2011
Original image (left), and with different color samples applied (center and right)
Sample Point The center of the sampled area.
Sample Radius The radius of the sampled area.
Average Pixel Color Which color values are sampled:
• Skip Empty Samples the average RGB color values, excluding those of transparent pixels.
• All Samples the average of all RGB color values, including those of transparent pixels.
• All Premultiplied Samples the average of all RGB color values, premultiplied with the alpha channel.
• Including Alpha Samples the average of all RGB color and alpha channel values. The result is that the sampled color
also contains the average transparency of the sampled pixels.
Maintain Original Alpha When selected, the effect maintains the original clip’s alpha channel. If you choose Including
Alpha from the Average Pixel Color menu, the original alpha is stenciled over the sampled color.
Blend With Original The effect’s transparency. The result of the effect is blended with the original image, with the effect
result composited on top. The higher you set this value, the less the effect affects the clip. For example, if you set this
value to 100%, the effect has no visible result on the clip; if you set this value to 0%, the original image doesn’t show
through.
Grid effect
Use the Grid effect to create a customizable grid. Render this grid in a color matte or as a mask in the alpha channel of
the source clip. This effect is good for generating design elements and mattes within which other effects can be applied.
Original image (left) and with variations of effect applied (center and right)
Anchor The point of origin of the grid pattern. Moving this point offsets the pattern.
Size From How the dimensions of the rectangles are determined:
• Corner Point Each rectangle’s dimensions are those of the rectangle with opposite corners defined by the Anchor
and Corner points.
• Width Slider A rectangle’s height and width are equal to the Width value, meaning the rectangles are squares.
• Width & Height Sliders A rectangle’s height is equal to the Height value. A rectangle’s width is equal to the Width
value.
Border The thickness of the grid lines. A value of 0 causes the grid to disappear.