First, deal with the image within complex background by bilateral filtering , then original Image subtract the image after bilateral filtering，realize small target detection under complex background

Bilateral filter\4.jpg
................\bfilter2.m
................\binaryfilter.m
................\diaoyongshuangbianlvbocx.m
................\shuangbianlvboyuanli.m
................\2.jpg
Bilateral filter

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