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<?php
namespace OCA\FaceRecognition\Helper;
class Euclidean
{
/**
* Euclidean distance metric between two vectors
*
* The euclidean distance between two vectors (vector1, vector2) is defined as
* D = SQRT(SUM((vector1(i) - vector2(i))^2)) (i = 0..k)
* Refs:
* - http://mathworld.wolfram.com/EuclideanMetric.html
* - http://en.wikipedia.org/wiki/Euclidean_distance
* @param array $vector1 first vector
* @param array $vector2 second vector
* @return float The Euclidean distance between vector1 and vector2
*/
public static function distance(array $vector1, array $vector2): float
$n = count($vector1);
$sum = 0;
for ($i = 0; $i < $n; $i++) {
$sum += ($vector1[$i] - $vector2[$i]) * ($vector1[$i] - $vector2[$i]);
}
return sqrt($sum);
matiasdelellis /
facerecognition
