Offline processing: colour
selection (II)
The projector-camera system introduces a strong colour
cross-talk which makes difficult the colour identification
The cross-talk can be reduced with a calibration procedure:
 a pure red, green and blue patterns are projected over a colour-
neutral panel.
 a linear mapping is calculated between the colour instructions
and the perceived ones a cross-talk matrix is obtained
 this matrix approximates the behaviour of the projector-camera
system This matrix will be used online to reduce the cross-talk.