OpacityCommand.php

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<?php
 
namespace Intervention\Image\Imagick\Commands;
 
class OpacityCommand extends \Intervention\Image\Commands\AbstractCommand
{
    public function execute($image)
    {
        $transparency = $this->argument(0)->between(0, 100)->required()->value();
        
        $transparency = $transparency > 0 ? (100 / $transparency) : 1000;
 
        return $image->getCore()->evaluateImage(\Imagick::EVALUATE_DIVIDE, $transparency, \Imagick::CHANNEL_ALPHA);
    }
}