Set crop position to top

for my OG Meta-Images I use these snippet:
<?php echo $page->image()->crop(300, 200)->url(); ?>

But with these code will crop images on the center in height. How can I set the crop position to top?

Thanks for your help!

I hade the same problem so I made a plugin to solve it:

There is also an issue around it:

If you want even more control over the crop position, there is this great plugin by @flokosiol: