Multiphase flow imaging using an adaptive multi-threshold technique in electrical resistance tomography

► The iterative Gauss-Newton method with an adaptive multi-threshold method is applied to the multiphase flow imaging. ► Optimal threshold values are automatically computed by multi-Otsu's method in each iteration. ► The accuracy of reconstructed images is improved using the proposed method. ► The proposed method contributes to reducing the condition number and mitigating the ill-posedness of the ERT inverse problem.