Figure 3
Slope error (a) using 1D tracking of speckle and (b) after using the proposed method technique at zero voltage (c) using 1D tracking of speckle and (d) after using the proposed method technique at optimized voltage. The slope error map using the 1D speckle tracking method shows systematic vertical stripes. Triangles mark the region where the artefacts due to 1D integration have been corrected by the proposed method. |