如何知道PHP中的颜色是否在图片中?
function colorIsInPicture('path/to/picture.jpg', '#f55'){ }
答案 0 :(得分:0)
您需要使用检查像素颜色的函数来遍历每个像素。
imagecolorat()(示例#2)
答案 1 :(得分:0)
如果安装了the PHP Imagick extension,可以采取一种方法。
遍历每个像素,寻找目标颜色。
/**
* Warning: Untested, but *should* work.
* Takes a path to the image file and a color in the form 'rgb(r,g,b)'.
* Left as exercise to reader to test and write any hex support for $sColor.
*/
function colorIsInPicture($sPath, $sColor)
{
$im = new Imagick($sPath);
$it = $im->getPixelIterator();
foreach($it as $row => $pixels)
foreach($pixels as $column => $pixel)
if($pixel->getColorAsString() == $sColor)
return true;
return false;
}