User guide
KeylightThe Foundry
ADVANCED KEYING
31
Colour Correction
X Y Edge Method - determines the behaviour of the image at the left and
right crop boundaries. Four edge methods are supplied:
• Colour - fills the area between the crop line and the edge with the Crop
Colour.
• Reflect - reflects pixels about the current crop line. In other words, it
copies pixels from the other side of the current crop line into the area
between the current crop line and the screen edge.
• Repeat - copies pixels on the crop boundary to the screen edge.
• Wrap - copies pixels from the area between the opposite crop line and
its screen edge to the area between the current crop line and its screen
edge.
Note
Horizontal and vertical crop boundaries can have different edge methods, Cropping
is often used to remove unwanted pixels at the edge of an image. If a video clip is
digitized badly you may get black edges left and right. These can be easily removed
by moving the vertical crops and setting the edge method to Reflect.
Crop Colour - sets the fill colour used when the edge method is set to
Colour.
Colour Correction
The Colour Correction parameters allow you to modify the foreground
colours in your composite. In particular, reflected blues and greens from the
screen can be suppressed.
Brightness - the brightness equates to the overall luminance of the image.
Increase this value to make the image lighter and decrease this value to
make it darker.
Contrast - the contrast is the ratio of brightest tones to the darkest.
Increase this value for a contrasty image and decrease it to wash it out.
Saturation - this control will increase or decrease the colour saturation of
the image, making colours more or less intense.
Suppression Suppression - this controls colour suppression in the image. You can
choose to remove a specific primary, either Red, Green, Blue or their
complements, Cyan, Magenta or Yellow. For green screens you may find it
helpful to suppress green.
Suppression Amount - determines how strongly you want to reduce the
indicated component.
Suppression Balance - determines what to reduce the suppressed