Imagick::contrastImage

(PECL imagick 2.0.0)

Imagick::contrastImage — Change the contrast of the image

说明

bool Imagick::contrastImage ( bool $sharpen )

Warning

本函数暂无文档，仅有参数列表。

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.

参数

sharpen: The sharpen value

返回值

Returns TRUE on success.

错误／异常

Throws ImagickException on error.