应用数字图像处理技术对采集到的木材缺陷图像进行预处理，运用数学形态学腐蚀膨胀等运算填补缺陷中的空洞来提取缺陷目标图像(Using digital image processing technology to preprocess the collected wood defect images, use mathematical morphology corrosion expansion and other operations to fill holes in the defects to