výpočet barev pro funkci na záměnu barvy

$var_R = ($rgb[0] / 255);

$mycolors = array(array(255,0,0),array(255,126,126),array(86,13,0));
$lux = new Lux_color();
$hsv = $lux->rgb2hsv($mycolors);
print_r($hsv);

saturation*( cos(hue) + i*sin(hue))

$ah = average($im); // průměr vypočítaný z obrázku
var_dump($ah);
$rgb = Lux_Color::hsv2rgb([$ah, 1, 1]);

$avg_color = color_math::average( color_math::HEXarr2RGBarr($myColors) ); // průměr vypočítaný z vybraných barev
$rgb = Lux_Color::hsv2rgb(array($avg_color, 1, 1)); // už jsem si to opravil

<?PHP
include 'lux_class.php';

class color_math { 
  public function averageFromImage($im) {
      $w = imagesx($im); // image width
      $h = imagesy($im); // image height     
          $avg_angle = array(0, 0); $avg_sat = 0; $avg_light = 0;
      for ($x = 0; $x < $w; $x++) {
          for ($y = 0; $y < $h; $y++) {
              $rgb = imagecolorat($im, $x, $y);
              $r = ($rgb >> 16) & 0xFF;
              $g = ($rgb >> 8) & 0xFF;
              $b = $rgb & 0xFF;
              $rgb = array($r, $g, $b);
              $hsv = Lux_Color::rgb2hsv($rgb);   
              $avg_angle[0] += ($hsv[1] + $hsv[2]) / 2 * $hsv[1] * cos($hsv[0] * 2 * M_PI);
              $avg_angle[1] += ($hsv[1] + $hsv[2]) / 2 * $hsv[1] * sin($hsv[0] * 2 * M_PI);
                            $avg_sat += $hsv[1]; // saturace se mění lineárně
              $avg_light += $hsv[2]; // světlost se mění lineárně
          }
      }
            $avg_sat = $avg_sat / $n;
            $avg_light = $avg_light / $n; 
      return array('avgangle'=>self::getAngle($avg_angle[0], $avg_angle[1] ), 'avgsat'=>$avg_sat,'avglight'=>$avg_light ); 
  }
   
  public function average($colors ) {    
          $avg_angle = array(0, 0); $avg_sat = 0; $avg_light = 0;
      for ($n = 0; $n < count($colors); $n++) {
              $r = $colors[$n][0]; $g = $colors[$n][1]; $b = $colors[$n][2];
              $rgb = array($r, $g, $b);
              $hsv = Lux_Color::rgb2hsv($rgb);
              $avg_angle [0] += ($hsv[1] + $hsv[2]) / 2 * $hsv[1] * cos($hsv[0] * 2 * M_PI);
              $avg_angle [1] += ($hsv[1] + $hsv[2]) / 2 * $hsv[1] * sin($hsv[0] * 2 * M_PI);
                            $avg_sat += $hsv[1]; // saturace se mění lineárně
              $avg_light += $hsv[2]; // světlost se mění lineárně
      }
            $avg_sat = $avg_sat / $n;
            $avg_light = $avg_light / $n; 
      return array('avgangle'=>self::getAngle($avg_angle[0], $avg_angle[1] ), 'avgsat'=>$avg_sat,'avglight'=>$avg_light ); 
  }

  public function getAngle($x, $y) {
      if ($x >= 0) {
          if ($y >= 0) {
              return atan2($y, $x) / (2 * M_PI);
          } else {
              return self::getAngle(-$y, $x) + 0.75;
          }
      } else {
          if ($y >= 0) {
              return self::getAngle($y, -$x) + 0.25;
          } else {
              return self::getAngle(-$x, -$y) + 0.5;
          }
      }
  }
    
    /** arg1 - single dimension array, where 
             arg1[0] = string hex color 1 , hex1[1] = string hex color 2 , etc. **/
    public function HEXarr2RGBarr(&$HEXcolors)
    {
    $RGBcolors = array();
    foreach ( $HEXcolors as $HEXcolor):
                    $RGBcolors[] = Lux_Color::hex2rgb($HEXcolor);
    endforeach;
    return $RGBcolors;
    }

} // end of class 
 
$im = imagecreatefrompng("test.png");
$w = imagesx($im); // image width
$h = imagesy($im); // image height

$myColors = array( 'cc825f', 'f21a1a', '9b5042', '933f31', 'd3b8af', 'ff9393', 'd09e9e');
/** vrací avgangle, avgsat, avglight **/
$avg_color_info = color_math::average( color_math::HEXarr2RGBarr($myColors) );

/// $avarage_color_info_from_file = color_math::averageFromImage($im);
// var_dump($avarage_color_info_from_file);
 
$rgb = Lux_Color::hsv2rgb(array($avg_color_info['avgangle'], $avg_color_info['avgsat'], $avg_color_info['avglight'])); // array($avg_color[''], 1, 1)
var_dump($rgb);
$c = imagecolorallocate ($im, $rgb[0], $rgb[1], $rgb[2]);
var_dump($c);
imagefilledrectangle ($im, 0, 0, $w, $h, $c);
 
imagepng($im, 'result.png');
imagedestroy($im);
?>

    public function hex2hsv($hex)
    {
///            return $this->rgb2hsv($this->hex2rgb($hex));
        return self::rgb2hsv(self::hex2rgb($hex));
    }

if ( $s && $s !=1  ) 
{
$replace = Lux_Color::hsv2rgb(array($h,$s,$v));
// here we use the new color, but the original alpha channel
$colorB = imagecolorallocatealpha($im, round($replace[0]), round($replace[1]), round($replace[2]), $c['alpha']);
imagesetpixel($im, $x, $y, $colorB);
}

    imageAlphaBlending($im, true);
    imageSaveAlpha($im, true);
    header('Content-Type: image/png');
    imagepng($im);
    imagepng($im, $file_copy);
    imagedestroy($im);

if ($s <= 0.500323723558 )  // téměř bílá, šedá nebo černá
  $s = 0;

if (isset($h)): 
 // např. $h['ll'] = 12°  
 // $h['ul'] = 13°
$this->ll1 = (is_array($h)?$h['ll']:$h)*(1/360); 
$this->ul1 = (is_array($h)?$h['ul']:$h)*(1/360); 
endif; // hue