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PHP实现获取图片颜色值的方法

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2016-06-13 09:29:361375browse

PHP实现获取图片颜色值的方法

   本例讲述了PHP实现获取图片颜色值的方法,PHP获取图片颜色值检测图片主要颜色是通过imagecreatefromjpeg函数读取图片,再循环获得各个颜色值加以计算实现的。

  具体代码如下:

  

  $i=imagecreatefromjpeg("photo3.jpg");//测试图片,自己定义一个,注意路径

  for ($x=0;$x

  for ($y=0;$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;

  ?>

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