The Kalman filter is an algorithm to eliminate noise from statistical observations. The inputs and outputs are dependent on what you are applying it to.

A Kalman filter is a linear quadratic equation which is used primarily in the guidance and navigation systems in our current vehicles. It has numerous other functions as well.

Karl Brammer has written:

'Kalman-Bucy-Filter' -- subject(s): Control theory, Kalman filtering

i dont even know what that is

Wing Hong Lee has written:

'The discrete-time compensated Kalman filter' -- subject(s): Kalman filtering