A fast processing algorithm of the automatic counting device for counting spacers in a liquid crystals display (LCD) plate has been presented. It performs well in counting the number of spacers. We especially defined a counting mask which can detect the state of LCD plate very effectively and quickly. Deduced from the discriminate function analysis of spacers of a LCD plate, we can use an automatic counting device to replace artificial inspection. This system thus brings higher quality and effect to the LCD production line.

This work is sponsored by the National Science Council, Taiwan, Republic of China, under grant number NSC-87-2511-S-035-001.

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