Value

Meaning

TRUE

Pixels with values greater than or equal to the threshold value are ANDed with crVariance. The source pixel is first converted to 24-bit grayscale and then And-ed with crVariance. For pixels with values less than the threshold value, the RGB pixel value will be the same as the high byte source pixel value. That is R = G = B = High byte values of the source pixel.

FALSE

Pixels with values greater than or equal to the threshold value are set to crVariance. Pixels with values less than the threshold value are set to black.