PointCrop

The pointcrop module allows you to set focus points for images uploaded using Drupal's image fields.

The module also provides image effects for "Pointcrop crop" and "Pointcrop scale and crop", for focus point based cropping via Drupal's image style system.

This way, whenever an image is cropped to any dimensions, the focus point is always in the centre (or as close as possible) of the cropped image.

Pointcrop cropping gives great image cropping results in all cases but is particularly useful in situations where images need to be shown at different sizes and/or different orientations in different places.
In those cases, alternative methods such as manual cropping might not suit all the applications of a particular image.

In addition to the image effects provided by the module, there is also a PointCrop jQuery plugin that can be used to crop images on the front end, based on the focus points set using the pointcrop drupal module.

This module does not currently have any out of the box implementations of this jQuery plugin, but there is potential for it to in the future.