• 1. interclass variance: 组内方差 | 类间方差 | 组间变异数 | 组内变异数
• 2. minimum interclass variance: 最小类内方差
• 3. the minimum interclass variance: 最小类内方差

• 1.The method of minimum interclass variance needs to compute conic statistic in segmenting image, which costs a large computation but has less efficiency.
  最小类内方差法分割图像时需要计算二次统计量，运算量大，效率不高。
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