PHP implements the method of obtaining the color value of an image, _PHP tutorial

PHP implements the method of obtaining the color value of an image,

This example describes the method of obtaining the color value of an image in PHP. PHP obtains the color value of an image and detects the main color of the image by reading the image through the imagecreatefromjpeg function, and then looping to obtain each color value for calculation.

The specific code is as follows:

<&#63;php
$i=imagecreatefromjpeg("photo3.jpg");//测试图片，自己定义一个，注意路径
for ($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);
//示例：
echo $rAverage;
&#63;>

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