Single view-based reconstruction comparisons between DA and SP3 approximation on Fine mesh. Figures (a), (b), and (c) are the DA-based reconstruction results when the source was located at (4, −3, 0), (4, −3, 5), and (4, −3, 10) respectively. Figures (d), (e), and (f) are the counterparts with SP3-based reconstruction. Cross-sections with blue and red boundaries are the center position of actual and reconstructed sources respectively. Volumetric mesh denotes the reconstructed values larger than 10% of the reconstructed maximum.