Fig. 1. Schematic diagram of coordinate systems in ECT system with multiple cameras

Fig. 2. Schematic diagram of camera projection imaging process

Fig. 3. Projections of a cube at different Euler angles. (a) Theoretical values; (b) calculated by weight matrix in reference[9]; (c) calculated by weight matrix using linear interpolation principle

Fig. 4. Influence of sampling points on reconstruction. (a) Reconstruction parameters Cor; (b) reconstruction parameters RMSE; (c) reconstruction results

Fig. 5. Influence of IM on reconstruction. (a) Reconstruction parameters Cor; (b) reconstruction parameters RMSE; (c) reconstruction results

Fig. 6. Shepp-Logan model and its reconstruction results. (a) Simulation; (b) reconstrction; (c) reconstrcution using linear interpolation principle

Fig. 7. Projections of propane Bunsen flame in 3D space

Fig. 8. Reconstruction of a flame in 3D space. (a) Side 1; (b) side 2