(no version information, might be only in CVS)
Imagick::contrastImage -- Change the contrast of the image| Warning |
This function is currently not documented; only the argument list is available. |
| Warning |
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk. |
Enhances the intensity differences between the lighter and darker elements of the image. Set sharpen to a value other than 0 to increase the image contrast otherwise the contrast is reduced.