将CMYK颜色值和RGB颜色相互转换的PHP代码

 更新时间:2014年07月28日 16:37:48   投稿:whsnow   我要评论
本节主要介绍了将CMYK颜色值和RGB颜色相互转换的PHP代码,需要的朋友可以参考下
function hex2rgb($hex) {
$color = str_replace('#','',$hex);
$rgb = array('r' => hexdec(substr($color,0,2)),
'g' => hexdec(substr($color,2,2)),
'b' => hexdec(substr($color,4,2)));
return $rgb;
} // www.sxglgf.com
function rgb2cmyk($var1,$g=0,$b=0) {
if (is_array($var1)) {
$r = $var1['r'];
$g = $var1['g'];
$b = $var1['b'];
} else {
$r=$var1;
}
$cyan = 255 - $r;
$magenta = 255 - $g;
$yellow = 255 - $b;
$black = min($cyan, $magenta, $yellow);
$cyan = @(($cyan - $black) / (255 - $black)) * 255;
$magenta = @(($magenta - $black) / (255 - $black)) * 255;
$yellow = @(($yellow - $black) / (255 - $black)) * 255;
return array('c' => $cyan / 255,
'm' => $magenta / 255,
'y' => $yellow / 255,
'k' => $black / 255);
}
$color=rgb2cmyk(hex2rgb('#FF0000'));

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