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PHP GD image to text
Posted on: November 3, 2009 at 12:00 AM
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This example shows how to change image to text in php gd.

<?php

$file = imagecreatefromjpeg("image1.jpg");

$bw = 0;

$s = "index";

$dest_x = 40;

$dest_y = 30;

if (imagesx($file) > $dest_x or imagesy($file) > $dest_y) {

if (imagesx($file) >= imagesy($file)) {

$full_y = imagesy($file)*($dest_x/imagesx($file));

$full_x = $dest_x;

} else {

$full_x = imagesx($file)*($dest_y/imagesy($file));

$full_y = $dest_y;

}

} else {

$full_x = imagesx($file);

$full_y = imagesy($file);

}

$image = imagecreatetruecolor($full_x, $full_y);

imagecopyresized($image, $file, 0, 0, 0, 0, imagesx($image), imagesy($image), imagesx($file), imagesy($file));

for ($y=0;$y<imagesy($image);$y++) {

for ($x=0;$x<imagesx($image);$x++) {

 

$rgb = imagecolorat($image,$x,$y);

$r = ($rgb >> 16) & 0xFF;

$g = ($rgb >> 8) & 0xFF;

$b = $rgb & 0xFF;

 

if ($bw == 1) {

$max = max($r,$g,$b);

$grid[$x][$y] = str_repeat(str_pad(dechex($max),2,"0",STR_PAD_LEFT),3);

} else {

$grid[$x][$y] = sprintf("%02X%02X%02X",$r,$g,$b);

}

}

}

$pHex = "";

echo "<div style=\"line-height:0.8em; font-size:8pt; font-family:monospace; background-color: #000000;\">";

for ($y=0;$y<imagesy($image);$y++) {

for ($x=0;$x<imagesx($image);$x++) {

if ($grid[$x][$y] != $pHex) {

if ($pHex != "") { echo "</span>"; }

echo "<span style=\"color:#".$grid[$x][$y]."\">";

$pHex = $grid[$x][$y];

}

echo $s[($counter++%strlen($s))];

}

echo "<br>\n";

}

echo "</div>";

?>

After running the program you will get the following output

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Posted on: November 3, 2009

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