HD

Chapter 48 Video Filters 677
IX
Channel Filters
Channel filters allow you to manipulate the color and alpha channels of clips in your
sequence to create effects.
Color Correction Filters
Color correction filters let you adjust the black, white, and midtone color balance of
your clips. For detailed information on using these filters, see Chapter 56, “Color
Correcting Clips,” on page 827.
Filter Result
Arithmetic Performs an arithmetic operation, blending a specific color
channel of your clip with another color. You can choose the
operator used and the channel it’s applied to from pop-up
menus. The color controls allow you to specify the color with
which the channel interacts.
Channel Blur Allows you to apply varying amounts of blur to each of the color
and alpha channels of your clip simultaneously. Sliders let you
control how much blur is applied to each channel.
Channel Offset Offsets the position of one or all of a clip’s channels. You can
specify the channel to be offset from the Channel pop-up menu,
the amount of offset using the Center Offset control, and the type
of edge to be used from the Edges pop-up menu.
Color Offset Offsets the color of individual channels in the clip. Using this filter,
you can create posterizing style effects. You can invert the image or
wrap the colors. Sliders let you control the offset value for each
color channel in the clip.
Compound Arithmetic Performs an arithmetic operation on the clip and a second
specified clip. You can choose the operator and the channel from
pop-up menus.
Invert Inverts one or all channels of the selected clip. A Channel pop-up
menu allows you to select which channel or channels to invert, and
the Amount slider lets you adjust the amount of inversion to apply.
Filter Result
Color Corrector A basic filter for performing simple color correction. While not as
fully featured as the Color Corrector 3-way filter, it’s more likely to
be supported by real-time hardware.
Desaturate Highlights Lets you eliminate unwanted color that sometimes appears in the
highlights of an image when you apply one of the color
correction filters.
Desaturate Lows Lets you eliminate unwanted color that sometimes appears in the
blacks of an image when you apply one of the color correction filters.
RGB Balance Allows you to raise or lower the levels of the highlights, midtones,
and blacks of each channel—red, green, and blue—in RGB color
space individually.