The real2time images captured at night in pattern matching are usually corrupted by speckle noise , which depresses the matching performance. In order to suppress the influence of speckle noise to pattern matching , a new method has been proposed in the paper. The speckle noise is marked and then is out of correlation statistics in pattern matching. Compared with the most popular algorithms , such as median filtering andthe average filtering , this method is more efficient for pattern matching. Experimental results show that this method is available