He Chun, Feng Sang, Lu Xiao, et al. The Application of Morphology to Edge Detection of Traffic Signs[J]. 2013, 30(3): 101-104.DOI: 10.3969/j.issn.1007-7162.2013.03.019.
Images of traffic signs under the natural conditions were studied
and the results before and after using morphology operation were compared. Meanwhile
the images were processed with plus noise as interference
and experiments on standard conditions and interference were conducted. Experimental results show that very good results can be achieved via the smooth processing of images by using morphology and edge detection of them by using the LOG operator.