摘要
Otsu阈值法一直被用来求取单阈值。对Otsu阈值法进行了推广,利用Otsu阈值法来求取双阈值,推导了计算公式的两种表达形式,最后给出了图像测试结果。采用Otsu双阈值法对灰度直方图呈现三峰特性的图像进行分割,可以获得良好的二值化效果。
Otsu threshold method is still regarded as a excellent method of achieving single threshold. A new dual threshold method based on Otsu method is proposed. Two kinds of formula are deduced and a test result is shown. Otsu dualthreshold is appropriate for the image of which grey histogram is characterized by three peaks.
出处
《机械》
2004年第7期12-14,共3页
Machinery
关键词
图像测量
二值化
双阈值
直方图
image measuring
binarization
dual threshold
histogram
