- Method threshold
object threshold(int level)
object threshold(int r, int g, int b)
object threshold(Color color)
Makes a black-white image.
If any of red, green, blue parts of a pixel is larger then the given value, the pixel will become white, else black.
This method works fine with the grey method.
If no arguments are given, it will paint all non-black pixels white. (Ie, default is 0,0,0.)
original ->threshold(100); ->threshold(0,100,0);
the new image object
The above statement "any ..." was changed from "all ..." in Pike 0.7 (9906). It also uses 0,0,0 as default input, instead of current color. This is more useful.
- See also