added kalman filter

[Aaryansh7]

self made kalman filter created that can be used for any state with any covariance

[7ayushgupta]

Nice work! But @shubhamkorde used the package itself.
Any idea why you would want to use your self written code?

[Aaryansh7]

Nice work! But @shubhamkorde used the package itself.
Any idea why you would want to use your self written code?

Actually I have now realized that me and @shubhamkorde worked on same thing.I had not installed the package ,so did not realize it.Already made package would be much better!

[7ayushgupta]

Chill hai, you can save this code into a utils package. Kalman filter is usually needed in other places too, one can use it. (But it already comes implemented everywhere, even it is there in opencv)