Any photographer who does more than snapshots have wondered at some time (but in the photo it does), how it will look at your photo. To try to find an answer to that question is lots of composition rules that help direct the viewer's gaze, being in the hands of a good photographer to determine which is the first thing is to see and where we are going to turn our gaze to below.

But any rule of composition is only theory that can work, or not. However it is possible to find out exactly how each person looks at a picture.

Probably the best known composition rule is known as the rule of thirds, which adopts the point of interest should be at the intersection of the lines that divide the frame into thirds horizontally and vertically. It is but a simplification of the Golden Ratio. Another well-known is the one that says that a moving subject must have free space in the direction towards which it moves and not the opposite.

Are not unique, there are many rules that can be applied alone or in combination, and willfully infringe even for a deeper impact. However, no guarantee that the result is expected.

At the end of every photographer should try to make the photo look just like the thought, starting at a point, running the image through its elements to the point of interest, and stopping at the. When not successful, the impact of the picture is reduced and decreases its appeal.

But figuring out how a picture really is no easy task. Do not look at it as you see yourself, it is a totally biased opinion. Nor does much to ask someone as you have seen. Certainly the comments of a photographer not to be too vague and imprecise, because those who are not familiar with the composition does not know give us the answers we seek. So how can we find out?

Eye tracking

Recently in my work, I had occasion to use a few days a team of eye tracking or eye tracking . They are specially trained monitors to record that part of the display is facing exactly the user, which is used primarily in research, marketing and usability studies.

For preliminary testing in the beginning to learn to operate the equipment I used some of my photos as shown, and office mates as subjects of study . Are obviously loose data are of no use, but give an idea of how a particular person is actually a particular photo.

The following video shows some of the photos used with lines and red dots overlays that reflect where you looked. The lines are eye movements during which the brain can not process any image. The points are the breaks in that if the image is perceived. The longer the pause lasts, the bigger it makes the point.