| Figure 4: (a) Representation of the measurement result as a video sequence with multiple true color frames acquired under different color illuminations. The white areas on the first frame are the actual 36 ROIs from which the spectral fingerprints are extracted. The fingerprints are the information along the columns of the picture on the right, unfolded in the red, green, and blue components. (b) Principal components 2D scores plot of the fingerprints of all pixels within each ROI for the IC alignment without ambient light. The colors of the scores correspond to the colors of the ROI in the sensor layout. (c) Idem to (b) but with additional ambient illumination. (d) Idem to (b) but for the DC alignment. (e) Idem to (d) but with ambient illumination. |
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