JPG转成ASCII的php代码

2015/01/23 40281

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将一张JPG图像转换成ASCII码。 
<html>
<head>
<title>Ascii</title>
<style>
body{
    line-height:1px;
    font-size:1px;
}
</style>
</head>
<body>
<?php  
function getext($filename) {  
    $pos = strrpos($filename,'.');  
    $str = substr($filename, $pos);  
    return $str;  
}  
$image = 'image.jpg'; 
$ext = getext($image);  
if($ext == ".jpg"){  
    $img = ImageCreateFromJpeg($image);  
}  
else{  
    echo'Wrong File Type';  
}  
$width = imagesx($img);  
$height = imagesy($img);  

for($h=0;$h<$height;$h++){  
    for($w=0;$w<=$width;$w++){  
        $rgb = ImageColorAt($img, $w, $h);  
        $r = ($rgb >> 16) & 0xFF;  
        $g = ($rgb >> 8) & 0xFF;  
        $b = $rgb & 0xFF;  
        if($w == $width){  
            echo '<br>';  
        }else{  
           echo '<span style="color:rgb('.$r.','.$g.','.$b.');">#</span>'; 
        }  
    }  
}  
?>
</body>
</html>