Jenssegers\ImageHash\Implementations\PerceptualHash::median PHP Метод

    protected function median(array $pixels)
    {
        sort($pixels, SORT_NUMERIC);
        $middle = floor(count($pixels) / 2);
        if (count($pixels) % 2) {
            $median = $pixels[$middle];
        } else {
            $low = $pixels[$middle];
            $high = $pixels[$middle + 1];
            $median = ($low + $high) / 2;
        }
        return $median;
    }