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Kalman Filter Question

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Hello forum, I am trying to understand the theory behind kalman filter and I have a question to ask. I am following the tutorial shown here. http://opencvexamples.blogspot.com/2014/01/kalman-filter-implementation-tracking.html The predicted position of the cursor is always "lagging behind" no matter how high the velocity of the transition matrix is at. I even tried setting it to 100. What values should I change such that the filter predicts the position of my cursor way ahead ? In other words, I would like the prediction to not lag behind, just like the particle filter for tracking.

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