10-05-2017, 07:51 AM
Yes, once the requirements are defined, some automation is possible. A straight passeport photo was one that I thought might be a possibility, but my crystal ball is broken 
Very unlikely to be just a straight crop. As pointed out, different places have different requirements, size of printed image for one, which brings in the subject of ppi. Then certain proportions on that image say, top of head to bottom of chin, colour of background, no smiling, no spectacles, at least one ear showing. All sorts.
Guides needed, maybe scaling and moving needed before cropping is considered or even needed.
An example, https://i.imgur.com/JvNNKh7.jpg and definitely no smiling.
Very unlikely to be just a straight crop. As pointed out, different places have different requirements, size of printed image for one, which brings in the subject of ppi. Then certain proportions on that image say, top of head to bottom of chin, colour of background, no smiling, no spectacles, at least one ear showing. All sorts.
Guides needed, maybe scaling and moving needed before cropping is considered or even needed.
An example, https://i.imgur.com/JvNNKh7.jpg and definitely no smiling.