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EURASIP Journal on Image and Video Processing
Figure 2 | EURASIP Journal on Image and Video Processing

Figure 2

From: Analysis of colour constancy algorithms using the knowledge of variation of correlated colour temperature of daylight with solar elevation

Figure 2

Residual illuminant dependency of five Munsell colours on the feature space formed by the model-based algorithm when changing the CIE standard daylight illuminants from 4,000 to 25,000 K. The responses were quantised to 10 bits. In the left-hand panel (a), each cross shows the feature obtained by illuminating one of the Munsell sample with one of the CIE standard illuminant. In the right-hand panel (b), each star shows the noisy feature corresponding to the point shown in the left-hand panel. Here, the sensor noise was modelled as Gaussian noise of 100 samples with 40-dB SNR. The dimension of the clusters in the direction of red arrow shows the significance of the illuminant dependency and the dimension perpendicular to that of the red arrow shows the significance of the noise.

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