Abstract: In the process of multi-colour(more than 2 colours) textile pattern distinguishment,whatever distinguishing principle is available now to us,is liable to face the problem ofcolour boundary confusion—a result of serious pattern outline or profile distortion frominformation obtained.In this paper the photo-electric process has been traced thatbrings about this problem.Also,the sourcing of transition colours has been explcredand hence the pertinent corrective term reached,thus,leading to a model of transitioncolour information acquisition and pocessing.This model has been used for a longtime on trial basis,and has proved to be a reliable and pratical method for the solution to colour boundary problem。