Compensation of elemental image using multiple view vectors for off-axis integral floating system.

A novel method is proposed to compensate the distortion caused by the off-axis structure in integral floating with a concave mirror. The proposed method of this paper can generate the elemental image that is integrated into the multiple predistortion images for the corresponding multiview directions, which cannot be performed by the predistortion method using a single-view vector. The fundamental concept of the proposed method is that the predistortion images can be generated for more than two view vectors, which are defined by each set of corresponding elemental lens and subimage, and captured onto the subimage. In addition, the subimage can be divided into the several segments to increase the number of view vectors, so that the predistortion images generated by more view vectors can enhance the degree of compensation. The proper number of the view vectors per subimage is discussed and analyzed based on the small-angle approximation. Experiments to verify the feasibility of the proposed method are performed.