อัพโหลดรูป .PNG แล้วกลายเป็นสีดำ เมือ Resize ครับ ช่วยที

if($_FILES["myfile"]["tmp_name"] != "")
{
			
			$images = $_FILES["myfile"]["tmp_name"];
			$images_file = $_FILES["myfile"]["type"];
			$images_time = date('YmdHis');
			srand((double)microtime()*1000000); //ทำการสุ่มชื่อ
			$Pic_name=$random_pic = rand(1,9999999);
			if( $images_file == "image/gif" )
				{
						$filename = $Pic_name.".gif";
						$root = "../upload/";
				}
			if ($images_file=="image/jpeg"||$images_file=="image/pjpeg")
				{
						$filename = $Pic_name.".jpg";
						$root = "../upload/";
				}
				if ($images_file=="image/png"||$images_file=="image/x-png")
				{
						$filename = $Pic_name.".png";
						$root = "../upload/";
				}

			$new_images = $images_time.$filename;
			
copy($_FILES["myfile"]["tmp_name"], $root  . $new_images);		

	$size=GetimageSize($images);

//png
if($size[0]>=480 && $images_file=="image/png"||$images_file=="image/x-png")
{
$width=480; //*** Fix Width & Heigh (Autu caculate) ***//
echo"111";
$height=round($width*$size[1]/$size[0]);
$images_orig = ImageCreateFromPNG($images);
$photoX = ImagesX($images_orig);
$photoY = ImagesY($images_orig);
$images_fin = ImageCreateTrueColor($width, $height);
ImageCopyResampled($images_fin, $images_orig, 0, 0, 0, 0, $width+1, $height+1, $photoX, $photoY);
ImageJPEG($images_fin,"../upload/".$new_images);
ImageDestroy($images_orig);
ImageDestroy($images_fin);
}

}