Figure 7. The effects of basis properties on reconstruction quality.

We used the Y-shaped morphology and the 4 × 4 electrode setup to investigate the effect of using various basis numbers for the reconstruction. L1 error was calculated to compare the results for basis with $M=32,128,512,1024$ elements, for several values of basis width $R$ and $\lambda$. With few basis sources one cannot recover CSD properly. As the number of basis functions increases, the reconstruction error is minimized for moderate values of $\lambda$ and for narrow basis sources, which can best resolve small details of the CSD to be reconstructed.