Gyro mouse de-drift and hand jitter reduction

A gyroscope-based device comprising:

• an input for receiving angle velocity data obtained from digitized gyroscope sensor data;
• a first summation node for reducing said angle velocity data by a drift error compensation offset;
• a first multiplication node for multiplying the result of said first summation node by a variable hand jitter compensation factor to produce a new angle velocity;
• and
• an output node for outputting said new angle velocity;
• wherein:
• the value of said variable hand jitter compensation factor is dependent upon a computation of involuntary movement currently experienced by said gyroscope-based device as determined from a currently received angle velocity datum;
• said computation of involuntary movement is a computation of probability of said gyroscope-based device being in a static state;
• each current sample n of said digitized gyroscope sensor data defines a current cycle;
• said currently received angle velocity datum is identified as G_Corr(n) and is obtained from current sample n of said digitized gyroscope sensor data;
• the new angle velocity obtained from the current sample n of said digitized gyroscope sensor data is denoted as G_New(n);
• and
• said gyroscope-based device further comprising:
• a) a probability processing unit receiving said intermediate angle velocity and determining a probability p(n) value for the current sample n, said probability p(n) being said computation of probability of said gyroscope-based device being in a static state within the current cycle defined by current sample n;
• and
• wherein the value of said variable hand jitter compensation factor for the current sample n is denoted as k(n) and is defined as k(n)=1·p(n).