Python Image Registration and Cropping?

[Ian Kelly]

On Sun, May 4, 2014 at 7:24 AM, Dave Angel <davea at davea.name> wrote:
> mikejohnryan08 at gmail.com Wrote in message:
>> Hello,
>>
>> Is there a Python tool or function that can register two images together (line them up visually), and then crop them to the common overlap area?  I'm assuming this can probably be done with Python Imaging Library but I'm not very familiar with it yet.
>>
>> Any help or advice is appreciated!
>>
>> Thanks!
>>
>
> Without some context I'd call the problem intractable.  I've done
>  such things using Photoshop to insert elements of one image into
>  another.  But even describing an algorithm is difficult,  never
>  mind trying to code it.

Well, fortunately there are known algorithms already:
http://en.wikipedia.org/wiki/Image_registration

> If I had such a challenge,  I'd probably use Pillow, but not till
>  I knew what subset I was solving.

I don't think Pillow has any support for registration.  I'd probably
start by looking for Python bindings of a library that does handle it,
like ITK.  Searching for "itk python" turns up a number of results.