How to scale an image without anti-aliasing?

Question

PHP

When I scale an image using

$result->scaleImage($result->getImageWidth()*1.1, $result->getImageHeight() * 1.1);

I get stuff like this


And I need it to work without them


How can I do this in PHP or just in the console using imagemagick?
UPD: Found an undocumented function Imagick::setAntiAlias(bool); but it doesn't seem to work

Answer 1

Could be something like this:

convert input.png -interpolate Integer -filter point -resize "10000%" output.png