Patent ID: 7095487

Claim:
A method for determining a distance to an object, the method comprising calculating the distance d in accordance with the equation: d = a 0 + a 1 ⁢ I 1 + a 2 ⁢ I 2 + … ⁢ ⁢ a n ⁢ I n b 0 + b 1 ⁢ I 1 + b 2 ⁢ I 2 + … ⁢ ⁢ b n ⁢ I n , wherein a 0 represents a first calibration bias, b 0 represents a second calibration bias, I i represents a measurement of integrated intensity of light associated with a shutter location i, a i represents a first calibration parameter for the shutter location i, and b i represents a second calibration parameter for the shutter location i and where i=1, 2, . . . , n.