Patent ID: 6108435
Filing Date: 2000-08-22
Classification: G06T

Abstract:
A method of detecting a phase difference between a pair of images of an object, which images are formed on a pair of optical sensor arrays through different optical paths comprising the steps of:preparing a sensor data group representing a pattern of each of said pair of images and consisting of sensor data received from each of said pair of optical sensor arrays,correcting said sensor data group so as to eliminate a difference in an average value of the sensor data between the optical sensor arrays caused by a presence of flare in one of said pair of images;preparing a plurality of combinations each having two subgroups corresponding to said pair of optical sensor arrays, each of said two subgroups consisting of a predetermined number of a series of sensor data, which are selected from the sensor data group which has been corrected such that a portion of the sensor data group from which the subgroup is selected is sequentially shifted; andselecting one of the combinations having a maximum degree of correlation between the subgroups thereof, and detecting a phase difference from positions on said optical sensor arrays which correspond to the subgroups of the selected combination.