分類用特徴抽出する昔つくったphpクラス

pjFeature.php

<?php

/**
 * pjFeature.class.php
 *
 * 分類に使用する特徴を作成するクラス
 *
 * @package    goalstart
 * @subpackage pjFeature
 *
 */
class pjFeature
{ 
  /**
   * 特徴量の配列を取得する
   * 
   * @param $coordinate 座標配列
   * @return $feature_array 特徴量配列
   */
  public static function getFeatureArray($coordinate, $score){
    $feature_array = array();
  
    // 角度の取得
    $angle = array();
    $angle[0] = pjGeometry::getInteriorAngle(0, $coordinate);
    // 特徴量削減
    //$angle[1] = pjGeometry::getInteriorAngle(1, $coordinate);
    //$angle[2] = pjGeometry::getInteriorAngle(2, $coordinate);
    //$angle[3] = pjGeometry::getInteriorAngle(3, $coordinate);
    
    // 周囲(特徴量削減)
    //$perimeter = pjGeometry::getPerimeter($coordinate);
    
    // 標準偏差、共分散行列の固有値
    $varience = pjGeometry::getVarianceCovarianceMatrix($coordinate);
    
    // アスペクト比
    $aspect = pjGeometry::getAspectRatio($coordinate);
    
    // 内積
    $inner = array();
    $inner[0] = pjGeometry::getInner(0, $coordinate);
    $inner[1] = pjGeometry::getInner(1, $coordinate);
    
    // 特徴量配列の作成
    $feature_array['angle0'] = $angle[0];
    //$feature_array['angle1'] = $angle[1];
    //$feature_array['angle2'] = $angle[2];
    //$feature_array['angle3'] = $angle[3];
    //$feature_array['perimeter'] = $perimeter;
    $feature_array['inner0'] = $inner[0];
    $feature_array['inner1'] = $inner[1];
    $feature_array['score'] = $score;
    $feature_array['deltax'] = $varience['deltax'];
    $feature_array['deltay'] = $varience['deltay'];
    $feature_array['vev'] = $varience['vev'];
    $feature_array['aspect'] = $aspect;

    return $feature_array;
  }
}