下面 PHP 中的 0.05 這個數字看需求來調整.
目前測試的圖片是否黑白還是彩色都算是正常.記錄.
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| <?php
$image_path = $argv[1];
list($width, $height, $type, $attriable) = getimagesize($image_path);
$image = imagecreatefrompng($image_path);
$colorful = $black_white = 0;
$saturation = function($r, $g, $b) {
$r = ($r / 255);
$g = ($g / 255);
$b = ($b / 255);
$min = min($r, $g, $b);
$max = max($r, $g, $b);
$low = $max - $min;
return $low === 0 ? 0 : $low / $max;
};
for($i=0; $i<$width; $i++) {
for($j=0; $j<$height; $j++) {
$rgb = imagecolorat($image, $i, $j);
$red = ($rgb >> 16) & 0xFF;
$green = ($rgb >> 8) & 0xFF;
$blue = $rgb & 0xFF;
if ($saturation($red, $green, $blue)*250 < 40) {
$black_white++;
}else{
$colorful++;
}
}
}
echo ($colorful/$black_white > 0.05) ? "colorful" : "black and white";
echo "\n";
?>
|
