(PECL imagick 2.0.0)
Imagick::getImageExtrema — Gets the extrema for the image
此函数在 Imagick 3.4.4 中被 废弃,强烈建议不要应用此函数。
Gets the extrema for the image. Returns an associative array with the keys "min" and "max".
Returns an associative array with the keys "min" and "max".
错误时抛出 ImagickException。