PHP 实现的将图片转换为TXT
发布:smiling 来源: PHP粉丝网 添加日期:2021-06-20 17:14:11 浏览: 评论:0
今天在用PHP写一个小插件的时候,遇到了一个小小的问题,就是需要将图片转换为TXT文本的内容,简单的说就是将图片转换为ASCII码,下面把代码分享给大家。
PHP 实现的将图片转换为TXT
- <?php
- /*
- 2015年10月19日10:24:59
- */
- // 打开一幅图像
- $file_name='d:\ascii_dora.png';
- $chars = "$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ";
- 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<196){
- $unit = (256.0 + 1)/$length;
- return $chars[intval($gray/$unit)];
- }
- return " ";
- }
- function color_img($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);
- $rand=rand (0, $length-1);
- $color="rgb(".$r.",".$g.",".$b.")";
- $char=$chars[$rand];
- return '<span style="color:'.$color.'" >'.$char."</span>";;
- }
- function resize_img($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;$i<=$height;$i++){
- for($j=1;$j<=$width;$j++){
- $color_index = imagecolorat($im, $j-1, $i-1);
- $color_tran = imagecolorsforindex($im, $color_index);
- $back_text.=color_img($color_tran,$chars,false);
- }
- $back_text.="<br/>";
- }
- echo "<pre>";
- echo $back_text;
- echo "</pre>";
- //file_put_contents('1.txt',$back_text);
Tags: PHP图片转换TXT
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