Cropping images is an art and it is the final touch to your photo just like the seal of a Japanese calligrapher pressed at the very end on the work. There is a saying that goes "印鑑までの作品", which means "a (perfect) work (is one that goes) all the way to the (author's) seal". The same in photography, cropping is a very powerful tool in your photo editing arsenal. Most of my portraits are cropped in camera during shooting, but sometimes I create composites or change the background, like in this photo of Katie. She was cut out and placed on a new background, and since she wanted a circle shaped final shot I had to place her in the dead center of the frame (see the photo to the right). Now I would never shoot a portrait this way, unless it was for a poster with some promotional materials or texts waiting to be added, then I would make space for it. So, I had to go in and crop the image to make her really shine. Below you can see 5 different crops that I created and all of them have a slightly different feel. Crop 1 would be sliced in the headshot style for corporate use or for a bio on a website. Do not be afraid to cut tops of the heads, but when you do that make sure it is balanced with the space below the chin and around the face. Also pay attention to the background texture, it is important that it does not overpower the face, which is the main focus (scroll down to read more).
Crop 2 is a perfect square, which is a common format used by social media pages. Two things you need to remember when cropping images for such sites. 1. the are in square shape, and 2. they are usually tiny, so make sure that the face is filling the frame as much as possible. I placed her a bit to the left hand side of the frame, to create asymmetry which is perfectly empowered by the intersecting diagonal lines (created by both shoulders and the eyes). This creates an illusion of a triangle shape, and goes well with slanting lines of the background. Dynamic crop introduces movement and since she looks dynamic and jolly it fits perfectly.
Crop 3 is what Katie wanted for her page. Here I placed her eyes along the center line and cut off part of her right shoulder. The leading lines of the jacket going up and then curving with her face outline to the right forces eyes to circulate, which supports the shape of the crop. Note that Crop 1,2 and 3 have a corporate feel with emphasis on Katie but there is enough space for the background building to be registered by a viewer as an important element of the photo, even though it is out of focus. Background can be a powerful ally.
Crop 4 is more centered and looks it gives Katie more powerful image. Her being in the center suggests control, but at the same time her cheerful smile makes her approachable. This is a cross-over between a corporate shot and a more casual profile photo for a webpage. This could also be cropped lower, which would cut the top of her head and showed a bit more of the neck. I cropped it this way to move her eyes to the center.
Crop 5 has a corporate feel again, but it is in a vertical orientation. I sliced the right shoulder and emphasized the other one which is in perfect alignment with the building. The part of the building to the left frames her from the other side and it creates a narrowing effect which pushes the viewer's eyes to her face. Those buildings also create a natural vignette which introduces contrast and redirects the attention to Katie. She is a bit off center to the left, which balances the way she stands, the direction she is facing to and mirrors the direction the light is coming from.