PHP 实现的将图片转换为TXT_php技巧

PHP 实现的将图片转换为TXT

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function getimgchars($color_tran,$chars){
  $length = strlen($chars);
  $alpha=$color_tran['alpha'];
  $r=$color_tran['red'];
  $g=$color_tran['green'];
  $b=$color_tran['blue'];
  $gray = intval(0.2126 * $r + 0.7152 * $g + 0.0722 * $b);

  if($gray==0){
    return '.';
  }

  if($gray'.$char."";;
  
}

function resize_img($file_name,$chars,$flage=true){
  //header('Content-Type: image/jpeg');
  list($width, $height,$type) = getimagesize($file_name);
  $fun='imagecreatefrom' . image_type_to_extension($type, false);
  if($type==3){
    $flage=false;
  }
  $fun($file_name);
  $new_height =100;
  $percent=$height/$new_height;
  $new_width=$width/$percent;
  $image_p = imagecreatetruecolor($new_width, $new_height);
  $image = $fun($file_name);
  imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
  if($flage){
    return $image_p;
  }else{
    return $image;
  }

}

$im=resize_img($file_name,$chars);

$width=imagesx($im);
$height=imagesy($im);

$back_text="";

for($i=1;$i";
}
 
echo "
";
echo $back_text;
echo "
";
//file_put_contents('1.txt',$back_text);