Fig. 2.

Sample data extraction and analysis. Sample of one frame where digital values are visualized using heatmap from blue (low) to yellow (high). Top to bottom: Matrix before trimming matrix [$44\times 121$ digital values], matrix after trimming [$32\times 112$], POF matrix (left) and PWF matrix (right) [$32\times 56$ for both], difference between with and without filter matrix [$32\times 56$], normalized by the dynamic range of the device [$32\times 56$].