Abstract:

On the market of LED display,because of the problem of heat dissipation and aging,leading to display images appear display defect.And to defect detection by experienced operators through the eyes to finish,it was difficult to ensure that the efficiency and accuracy.In this paper,through the method of template matching by regional location and point positioning to extract the image of light intensity information,redraw the light point diagram,then based on the least square method of polynomial surface fitting method for surface defect separation,the results of experiment can effectively and accurately detect the display defect.It's has important significance for the LED display defect areas.

Key words: LED display unit;template matching;polynomial surface fitting;region defect