Abstract: Because the detection performance of coloured brightness mode display is related to visual psychological and physiological factors,it.is difficult to make a mathematical model and evaluate its performance quantitatively.The conception of'visual threshold'is proposed in the paper,based on it as well as the statistical model of displayed data,detection performance of display system can be analyzed theoretically Computer simulation result shows a good agreement with theoretical one.The quanitative model is helpful to design LOFAR display system of high quality.
LOFAR display are required to have these qualities such as wide dyntaic range,low detection threshold,well performance in unstable background noise without axtilicial adustment.'Adaptive coloured scale coversion algorithem'and'th (x) function scale conversion'algorithm'are proposed in the paper to acquire those qualities metioned above.They have been proved to be efficient in our experiment.