PHP IMG2TXT 图片转成文字

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最新推荐文章于 2025-04-03 16:18:35 发布

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分类专栏： php 文章标签： php 图片

本文链接：https://blog.youkuaiyun.com/lszxlong/article/details/50349484

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本文介绍了一个使用 PHP 实现的将图像转换为 ASCII 艺术的程序。该程序通过调整字符和颜色来模拟原始图像的灰度和色彩效果，最终输出为 HTML 的形式展示 ASCII 艺术效果。

<?php
/*
2015年10月19日10:24:59
by zxlong
*/
// 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);