php检测图片主要颜色的方法

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$i = imagecreatefromjpeg("image.jpg");

for ($x=0;$x<imagesx($i);$x++) {

for ($y=0;$y<imagesy($i);$y++) {

$rgb = imagecolorat($i,$x,$y);

$r = ($rgb >> 16) & 0xFF;

$g = ($rgb >> & 0xFF;

$b = $rgb & 0xFF;

$rTotal += $r;

$gTotal += $g;

$bTotal += $b;

$total++;

}

}

$rAverage = round($rTotal/$total);

$gAverage = round($gTotal/$total);

$bAverage = round($bTotal/$total);