In order to realize the rapid and accurate evaluation of luminous quality of light guide plate(LGP)and find nonuniform areas to optimize,we propose a new design method based on image processing technology,the evaluation criteria of luminous quality of LGP is deeply researched.The light distribution is represented by gray histogram,the evaluation formula of uniformity is given and the concept of evaluation precision Pis presented.Furthermore,the dots position corresponding to discrete grayscale is located wi...