For example, in case you discovered in matlab old step that you just had 9 values, then you might insert this quantity into matlab formula making it: Rank / 9+1 = Exceedance Probability. Number each particular person price, in accordance with its rank in matlab arrangement. The largest price can be ranked number 1, matlab second largest quantity two, and so forth, until each value has engineering rank. Decide which cost you want to use as matlab usual. The ordinary price is matlab value for which you are looking to calculate matlab exceedance possibility. Take matlab rank of this common cost and plug matlab into matlab formula. It is proven that matlab Binary morphology operator can obtain better edge function. Finally, if you want to gain clear and integral picture profile, matlab strategy of ordering closed is given. After experimentation, edge detection approach proposed during this paper is feasible. Keywords: Digital Image Edge detection, wavelet de noising, differential operators, and binary morphology. References:1. Lei Lichen, Discussion of electronic image edge detection approach, mappingavis, 2006, 3:40 42.