how can i convert image to binary image using php?

Question

Is there any way to convert Normal image to Binary Image (two possible values for each pixel. ie, a 0 or 1) ?

i have found some solution in Matlab but i am searching for a solution in PHP/JavaScript .

Answer 1

Using a lovely picture I've just taken of my keyboard I whipped up this example for you that converts a source image to a dithered 2-colour palette based image:

$src = imagecreatefrompng('test.png');

imagetruecolortopalette($src, true, 2);

header('Content-type: image/png');
imagepng($src);
imagedestroy($src);

Source:

Result:

If you don't want the dithering change the second parameter in imagetruecolortopalette($src, true, 2); to false :

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Edited to add:

The picture above is very simple and practically 2-colour already. Depending on the complexity of your source image(s) the result might be significantly worse.