DETERMINATION OF CHROMATIC ISOLUMINANCE INFORMATION FOR CONTROLLING A COMPUTER PROCESS IN A PERSONALISED MANNER

摘要

The invention uses the evaluation of the colour perception of users to control a computer process, for example a screen calibration or an authentication procedure. Taking advantage of the slow oscillatory response of the pupil, a pupil frequency tagging method is used at a tagging frequency Ftag adapted to the speed of the pupillary response in order to generate chromatic isoluminance information for each user. A dynamic multicoloured stimulus is displayed, comprising a multicoloured motif of which two colours are inverted at the frequency Ftag and one colour varies progressively through a range of possible values. On the basis of the pupillary response, a signal representing the power of the oscillatory response of the pupil is generated. The minimum of the signal corresponds to the relative isoluminance of the pair of colours tested.