Chroma Key is a technique used in film and TV production to combine multiple images or frames into a single composition. During the filming, the foreground object is placed in front of a monochromatic backdrop (usually green or blue). In the post production, the color background is removed and replaced with an alternative footage.
The Chroma Key mode in AKVIS SmartMask allows you to quickly and accurately remove a monochrome background.
Note: The feature is available only in Home Deluxe and Business licenses.
Attention! The chroma key should always be applied to the original image, so use this mode at the first processing stage. Otherwise, the previous changes will be lost.
To remove the background from an image, adjust the following parameters:
Uniform. The background pixels will be removed by the difference between their colors and luminance levels. Use this option for removing monochrome backgrounds as in blue screen or green screen images. Note that this method preserves more details then other methods.
Non-Uniform. The background pixels will be removed only by the difference between their colors. Use this option for images with an uneven background.
Gradient. This option uses a complex approach and is intended for removing gradient backgrounds.
|Uniform Background||Non-Uniform Background||Gradient Background|
The higher the to Drop Colors value, the more shades of the specified color will be removed from the image. The higher the to Keep Colors value, the more shades of the specified color remain in the image. The range between these two parameters determines the number of pixels that become translucent.
|Drop = 5, Keep = 20||Drop = 25, Keep = 50|
|Edges Recovery = 10||Edges Recovery = 100|
|Desaturation = 0||Desaturation = 100|
|Blur = 1||Blur = 5|
To accept the changes, press the OK button. To exit the mode without saving changes, click the Cancel button. To restore the default settings, click on Default.
To edit edges of the resulting fragment use the Refine Edges mode.
To replace the old background with a new one, use the Custom Background mode.