Input sequence: take pictures (at 30 f/s) on a static color chart under variable illumination condition.
Output plot: pick a pixel on each color square, and plot its color proportion and brightness along time. 24 plots below correspond respectively to 24 squares in the chart.
Legend: The color lines represent color proportions and the black line represents a re-scaled brightness, i.e., [ 0, 3*255 ] -> [ 0, 1].
- After the frame 1500, there are large color distortions. These are due to turning off the whole room lights except one hand-held lamp, i.e., it was too extreme case.
- In some bright colors like 'white', there is a clipping on brightness. (See the square 19 and 20)
- It would be good to see the plots of the weighted color deviations from the nearest codeword.