Geometric model and assessment of a dual‐fisheye imaging system

• DOI: 10.1111/phor.12240
• Publication Date: 2018-05-15T13:05:59Z
• Authors: Mariana Batista C...; Antonio Maria Gar...; José Marcato Junior; Eija Honkavaara
• Keywords: Equidistant; Bundle adjustment; Rotation matrix; Distortion (music); Base (topology); Matrix (chemical analysis); Essential matrix

Abstract This paper presents a technique for the calibration of 360° dual imaging system (Ricoh Theta S) composed two cameras with fisheye lenses specially mounted in common structure. The experiments are based on bundle adjustment using equidistant lens model and relative orientation stability constraints, such as distance, base elements rotation matrix between individual cameras’ coordinate systems. As result, an mathematical Conrady–Brown distortion was shown to be suitable estimating interior parameters Ricoh S. main contribution presented this work is simultaneous approach constraints angles, which achieved accuracies comparable conventional photogrammetric perspective cameras.