SUMMARY
The Extreme Black and White effect finds a brightness value where roughly half the pixels are above the value and half the pixels are below this value. The pixels above this value are set to white. The pixels below this value are set to black.
SLIDERS
White: Controls the proportion of white in the image.
USAGE
The Extreme Black and White effect yields an image that has much less information than the original image, because all color information and shading information has been lost. One possible use for this effect would be to represent images that you would not want to represent in vivid detail and color
(like a crime scene or a dream).