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Asked: 2026-06-11T01:48:28+00:00

I am currently doing a project called eye controlled cursor using MATLAB. I have

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I am currently doing a project called eye controlled cursor using MATLAB.
I have few stages before I extract out the center of the iris (which can be considered as a pupil location). face detetcion – > eye detection — > iris detection –>And finally i have obtained the center of the iris as show in the figure.

Now, I am trying to map this position (X,Y) to my computer screen pixel (1366 x 768). In most of the journals I have found, they require a reference point such as lips, nose or eye corner. But I am only able to extract the center of iris by doing certain thresholding. How can i map this position (X,Y) to my computer screen pixel (1366 x 768)?

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  1. Editorial Team

    Well you either have to fix the head to a certain position (which isn’t very practical) or you will have to adapt to the face position. Depending on your image, you will have to choose points that are always on that image and are easy to detect. If you just have one point (like the nose), you can only adjust for the x/y shift of your head. If you have more points (like the 4 corners of the eye, the nose, maybe the corners of the mouth), you can also extract the 3 rotational values of the head and therefore calculate the direction of sight much better. For a first approach, I guess only the two inner corners of the eye (they are “easy” to detect) will do.

    I would also recommend using a calibration sequency. You present the user with a sequence of 4 red points in the corners of the screen and he has to look at them. You can then record the positions of the pupils and interpolate between them.

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