
306 Appendix A
Key
Command Syntax Description
BlueScreen
BlueScreen(srcImage,
destImage, min,
max, fillRGB)
Creates a mask from the source
image buffer, extracting the blue
areas of the image. “min” and
“max” control the range of color
extraction. If “fillRGB” is 1, the
RGB channels are filled with a
grayscale mask. Otherwise only
the alpha channel is filled.
GreenScreen
GreenScreen(srcImage,
destImage, min,
max, fillRGB)
Creates a mask from the source
image buffer, extracting the
green areas of the image. “min”
and “max” control the range of
color extraction. If “fillRGB” is 1,
the RGB channels are filled with
a grayscale mask. Otherwise
only the alpha channel is filled.
BGDiff
BGDiff(srcImage,
destImage, min,
max, fillRGB)
Creates a mask from the source
image buffer, extracting the
areas of maximum difference
between the blue and green
channels. “min” and “max”
control the range of color
extraction. If “fillRGB” is 1, the
RGB channels are filled with a
grayscale mask. Otherwise only
the alpha channel is filled.
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